diff --git a/monitoring/monitorlib/fetch/__init__.py b/monitoring/monitorlib/fetch/__init__.py
index 74a0f44841..ee6e4610bb 100644
--- a/monitoring/monitorlib/fetch/__init__.py
+++ b/monitoring/monitorlib/fetch/__init__.py
@@ -459,6 +459,26 @@ def __init__(self, msg: str, queries: Optional[Union[Query, List[Query]]] = None
         else:
             self.queries = queries
 
+    @property
+    def last_status_code(self) -> int:
+        """Returns the status code of the last query present in this QueryError,
+        or 999 if this error contains no queries."""
+        if len(self.queries) == 0:
+            return 999
+        return self.queries[-1].status_code
+
+    @property
+    def query_timestamps(self) -> List[datetime.datetime]:
+        """Returns the timestamps of all queries present in this QueryError."""
+        return [q.request.timestamp for q in self.queries]
+
+    @property
+    def last_query(self) -> Optional[Query]:
+        """Returns the last query present in this QueryError, or None if this error contains no queries."""
+        if len(self.queries) == 0:
+            return None
+        return self.queries[-1]
+
     @property
     def stacktrace(self) -> str:
         return stacktrace_string(self)
diff --git a/monitoring/monitorlib/schema_validation.py b/monitoring/monitorlib/schema_validation.py
index 8865e09914..8be19ed7b7 100644
--- a/monitoring/monitorlib/schema_validation.py
+++ b/monitoring/monitorlib/schema_validation.py
@@ -58,6 +58,17 @@ class F3548_21(str, Enum):
     QuerySubscriptionsResponse = "components.schemas.QuerySubscriptionsResponse"
     DeleteSubscriptionResponse = "components.schemas.DeleteSubscriptionResponse"
 
+    ChangeOperationalIntentReferenceResponse = (
+        "components.schemas.ChangeOperationalIntentReferenceResponse"
+    )
+    GetOperationalIntentReferenceResponse = (
+        "components.schemas.GetOperationalIntentReferenceResponse"
+    )
+    QueryOperationalIntentReferenceResponse = (
+        "components.schemas.QueryOperationalIntentReferenceResponse"
+    )
+    AirspaceConflictResponse = "components.schemas.AirspaceConflictResponse"
+
 
 _openapi_content_cache: Dict[str, dict] = {}
 
diff --git a/monitoring/prober/infrastructure.py b/monitoring/prober/infrastructure.py
index d543476a4f..348dd28670 100644
--- a/monitoring/prober/infrastructure.py
+++ b/monitoring/prober/infrastructure.py
@@ -100,7 +100,7 @@ def wrapper_default_scope(*args, **kwargs):
 resource_type_code_descriptions: Dict[ResourceType, str] = {}
 
 
-# Next code: 380
+# Next code: 383
 def register_resource_type(code: int, description: str) -> ResourceType:
     """Register that the specified code refers to the described resource.
 
diff --git a/monitoring/uss_qualifier/configurations/dev/message_signing.yaml b/monitoring/uss_qualifier/configurations/dev/message_signing.yaml
index 56ccd5028b..f59feedc10 100644
--- a/monitoring/uss_qualifier/configurations/dev/message_signing.yaml
+++ b/monitoring/uss_qualifier/configurations/dev/message_signing.yaml
@@ -59,6 +59,7 @@ v1:
           dss: scd_dss
           dss_instances: scd_dss_instances
           id_generator: id_generator
+          utm_client_identity: utm_client_identity
           second_utm_auth: second_utm_auth
           planning_area: che_planning_area
           problematically_big_area: che_problematically_big_area
diff --git a/monitoring/uss_qualifier/scenarios/astm/utm/dss/__init__.py b/monitoring/uss_qualifier/scenarios/astm/utm/dss/__init__.py
index ed1e46c50f..ab93e62ecb 100644
--- a/monitoring/uss_qualifier/scenarios/astm/utm/dss/__init__.py
+++ b/monitoring/uss_qualifier/scenarios/astm/utm/dss/__init__.py
@@ -1,3 +1,4 @@
 from .subscription_validation import SubscriptionValidation
 from .subscription_simple import SubscriptionSimple
 from .crdb_access import CRDBAccess
+from .op_intent_ref_key_validation import OIRKeyValidation
diff --git a/monitoring/uss_qualifier/scenarios/astm/utm/dss/op_intent_ref_key_validation.md b/monitoring/uss_qualifier/scenarios/astm/utm/dss/op_intent_ref_key_validation.md
new file mode 100644
index 0000000000..d65c70e8ad
--- /dev/null
+++ b/monitoring/uss_qualifier/scenarios/astm/utm/dss/op_intent_ref_key_validation.md
@@ -0,0 +1,118 @@
+# ASTM SCD DSS: Operational Intent Reference Key Validation test scenario
+
+## Overview
+
+Verifies that a DSS requires from a client creating or updating operational intent references that they
+provide all OVNs for all currently relevant entities.
+
+## Resources
+
+### dss
+
+[`DSSInstanceResource`](../../../../resources/astm/f3548/v21/dss.py) the DSS instance through which entities are created, modified and deleted.
+
+### id_generator
+
+[`IDGeneratorResource`](../../../../resources/interuss/id_generator.py) providing the base entity ID for this scenario.
+
+### client_identity
+
+[`ClientIdentityResource`](../../../../resources/communications/client_identity.py) the client identity that will be used to create and update operational intent references.
+
+### planning_area
+
+[`PlanningAreaResource`](../../../../resources/astm/f3548/v21/planning_area.py) describes the 3D volume in which operational intent references will be created.
+
+## Setup test case
+
+### [Ensure clean workspace test step](./clean_workspace.md)
+
+This step ensures that no entities with the known test ID exists in the DSS.
+
+## Key Validation test case
+
+This test case will create multiple operational intent references and verify that the `key` field
+of the parameters to create or update an operational intent reference is properly validated.
+
+That is: the DSS should require that the client provide the OVNs for each entity that is in the vicinity,
+both geographically and temporally, of the client's operational intent reference.
+
+### Create non-overlapping OIRs test step
+
+This first test step creates two operational intent references that do not overlap in time, and
+should therefore both not require any entry in the `key` field.
+
+#### 🛑 First operational intent reference in area creation query succeeds check
+
+With no potentially conflicting entity present, the DSS is expected to allow the creation of an operational intent without
+the client specifying any OVN in the `key` field.
+
+If the DSS rejects a well-formed request to create the operational intent reference, it is in violation of **[astm.f3548.v21.DSS0005,1](../../../../requirements/astm/f3548/v21.md)**.
+
+#### 🛑 Second, non-overlapping operational intent reference creation succeeds check
+
+With a single existing OIR in the area that is not overlapping in time, the DSS is expected to allow the creation of an operational intent without
+the client specifying any OVN in the `key` field.
+
+If the DSS rejects a well-formed request to create the operational intent reference, it is in violation of **[astm.f3548.v21.DSS0005,1](../../../../requirements/astm/f3548/v21.md)**.
+
+### Attempt creation of overlapping OIRs test step
+
+This test step will attempt to create various operational intent references that intersect with either one or both of the previously created ones,
+and expect the DSS to require the relevant OVNs to be provided in the `key` field.
+
+Note that this step will optionally validate the response body of for `HTTP 409` error responses from the DSS when these contain the expected `missing_operational_intents` field.
+
+At the end of this step, the DSS is expected to have accepted the creation of 3 operational intent references.
+
+#### 🛑 Create operational intent reference with missing OVN fails check
+
+If the DSS allows the creation of an operational intent reference that is missing the required OVNs for other entities that exist in its geo-temporal vicinity,
+it is in violation of **[astm.f3548.v21.DSS0005,1](../../../../requirements/astm/f3548/v21.md)** and **[astm.f3548.v21.DSS0210,A2-7-2,2a](../../../../requirements/astm/f3548/v21.md)**
+
+#### 🛑 Failure response due to conflict has proper format check
+
+The DSS is expected to return a `HTTP 409` error response when the creation of an operational intent reference fails due to a conflict.
+This response is expected to conform to the OpenAPI spec that is part of **[astm.f3548.v21.DSS0005,1](../../../../requirements/astm/f3548/v21.md)**.
+
+Should this not be the case, then the DSS is in violation of the aforementioned requirement.
+
+#### 🛑 Failure response due to conflict contains conflicting OIRs check
+
+If the DSS returns a `HTTP 409` error response due to a conflict, and the response body contains a `missing_operational_intents` field,
+this field is expected to contain the conflicting OVNs.
+
+If the field exists but does not contain the conflicting OVNs, then the DSS is in violation of **[astm.f3548.v21.DSS0005,1](../../../../requirements/astm/f3548/v21.md)**.
+
+#### 🛑 Create operational intent reference with proper OVNs succeeds check
+
+If the DSS prevents the creation of an operational intent reference that is providing all required OVNs for other entities that exist in its geo-temporal vicinity,
+it is in violation of **[astm.f3548.v21.DSS0005,1](../../../../requirements/astm/f3548/v21.md)**.
+
+### Attempt mutation of operational intent reference to cause an overlap test step
+
+This test step will attempt to mutate an existing operational intent reference so that it overlaps with an existing one.
+
+The expectation is that the DSS will require the relevant OVNs to be provided in the `key` field.
+
+#### 🛑 Mutate operational intent reference with missing OVN fails check
+
+If the DSS allows the mutation of an operational intent reference that is missing the required OVNs for other entities that exist in its geo-temporal vicinity,
+it is in violation of **[astm.f3548.v21.DSS0005,1](../../../../requirements/astm/f3548/v21.md)** and **[astm.f3548.v21.DSS0210,A2-7-2,2b](../../../../requirements/astm/f3548/v21.md)**
+
+#### 🛑 Failure response due to conflict has proper format check
+
+The DSS is expected to return a `HTTP 409` error response when the creation of an operational intent reference fails due to a conflict.
+This response is expected to conform to the OpenAPI spec that is part of **[astm.f3548.v21.DSS0005,1](../../../../requirements/astm/f3548/v21.md)**.
+
+Should this not be the case, then the DSS is in violation of the aforementioned requirement.
+
+#### 🛑 Failure response due to conflict contains conflicting OIRs check
+
+If the DSS returns a `HTTP 409` error response due to a conflict, and the response body contains a `missing_operational_intents` field,
+this field is expected to contain the conflicting OVNs.
+
+If the field exists but does not contain the conflicting OVNs, then the DSS is in violation of **[astm.f3548.v21.DSS0005,1](../../../../requirements/astm/f3548/v21.md)**.
+
+
+## [Cleanup](./clean_workspace.md)
diff --git a/monitoring/uss_qualifier/scenarios/astm/utm/dss/op_intent_ref_key_validation.py b/monitoring/uss_qualifier/scenarios/astm/utm/dss/op_intent_ref_key_validation.py
new file mode 100644
index 0000000000..870f49ac35
--- /dev/null
+++ b/monitoring/uss_qualifier/scenarios/astm/utm/dss/op_intent_ref_key_validation.py
@@ -0,0 +1,428 @@
+from datetime import datetime, timedelta
+from typing import Dict, List
+
+from uas_standards.astm.f3548.v21.api import (
+    EntityID,
+    OperationalIntentReference,
+    OperationalIntentState,
+    AirspaceConflictResponse,
+)
+from uas_standards.astm.f3548.v21.constants import Scope
+
+from monitoring.monitorlib import fetch, schema_validation
+from monitoring.monitorlib.fetch import QueryError
+from monitoring.monitorlib.geotemporal import Volume4D
+from monitoring.monitorlib.schema_validation import F3548_21
+from monitoring.prober.infrastructure import register_resource_type
+from monitoring.uss_qualifier.resources.astm.f3548.v21 import PlanningAreaResource
+from monitoring.uss_qualifier.resources.astm.f3548.v21.dss import (
+    DSSInstanceResource,
+    DSSInstance,
+)
+from monitoring.uss_qualifier.resources.communications import ClientIdentityResource
+from monitoring.uss_qualifier.resources.interuss.id_generator import IDGeneratorResource
+from monitoring.uss_qualifier.scenarios.astm.utm.dss import test_step_fragments
+from monitoring.uss_qualifier.scenarios.scenario import (
+    TestScenario,
+    PendingCheck,
+)
+from monitoring.uss_qualifier.suites.suite import ExecutionContext
+
+
+class OIRKeyValidation(TestScenario):
+    """
+    A scenario that checks that Operational Intent references cannot be created or updated
+    if the client does not provide all relevant OVNs in the key field.
+
+    Note that this currently only uses Operational intents: constraint references
+    will be added at a later stage.
+    """
+
+    SUB_TYPE = register_resource_type(382, "Operational Intent Reference")
+
+    _dss: DSSInstance
+
+    # Base identifier for the OIR that will be created
+    _base_oir_id: EntityID
+
+    _oir_ids: List[EntityID]
+
+    # Keep track of the current OIR state
+    _current_oirs: Dict[EntityID, OperationalIntentReference]
+
+    def __init__(
+        self,
+        dss: DSSInstanceResource,
+        id_generator: IDGeneratorResource,
+        client_identity: ClientIdentityResource,
+        planning_area: PlanningAreaResource,
+    ):
+        """
+        Args:
+            dss: dss to test
+            id_generator: will let us generate specific identifiers
+            client_identity: Provides the identity of the client that will be used to create the OIRs
+            planning_area: An Area to use for the tests. It should be an area for which the DSS is responsible,
+                 but has no other requirements.
+        """
+        super().__init__()
+        scopes = {
+            Scope.StrategicCoordination: "create and delete operational intent references"
+        }
+        # This is an UTMClientSession
+        self._dss = dss.get_instance(scopes)
+        self._pid = [self._dss.participant_id]
+        self._base_oir_id = id_generator.id_factory.make_id(self.SUB_TYPE)
+
+        # We will be using three IDs for the OIRs
+        self._oir_ids = [self._base_oir_id[:-1] + f"{i}" for i in range(3)]
+
+        self._expected_manager = client_identity.subscriber()
+
+        self._planning_area = planning_area.specification
+
+        self._planning_area_volume4d = Volume4D(
+            volume=self._planning_area.volume,
+        )
+
+    def run(self, context: ExecutionContext):
+        self.begin_test_scenario(context)
+        self._setup_case()
+
+        self.begin_test_case("Key Validation")
+
+        self.begin_test_step("Create non-overlapping OIRs")
+        self._step_create_non_overlapping_oirs()
+        self.end_test_step()
+
+        self.begin_test_step("Attempt creation of overlapping OIRs")
+        self._step_attempt_create_overlapping_oir()
+        self.end_test_step()
+
+        # Confirm that the required OIRs were created
+        if len(self._current_oirs) == 3:
+            self.begin_test_step(
+                "Attempt mutation of operational intent reference to cause an overlap"
+            )
+            self._step_attempt_mutation_to_cause_overlap()
+            self.end_test_step()
+        else:
+            self.record_note(
+                "oir_mutation", "Skipping mutation step: expected OIR is missing"
+            )
+
+        self.end_test_case()
+        self.end_test_scenario()
+
+    def _step_create_non_overlapping_oirs(self):
+        """Creates two non-overlapping OIRs. They use the same planning area but are separated by time."""
+
+        # First OIR starts in the recent past and extends 20 minutes into the future
+        first_oir_params = self._planning_area.get_new_operational_intent_ref_params(
+            key=[],
+            state=OperationalIntentState.Accepted,
+            uss_base_url=self._planning_area.base_url,
+            time_start=datetime.now() - timedelta(seconds=10),
+            time_end=datetime.now() + timedelta(minutes=20),
+        )
+
+        # The second OIR will be for the same area, but starting one hour after the first one ends
+        second_oir_params = self._planning_area.get_new_operational_intent_ref_params(
+            key=[],
+            state=OperationalIntentState.Accepted,
+            uss_base_url=self._planning_area.base_url,
+            time_start=datetime.now() + timedelta(hours=1, minutes=20),
+            time_end=datetime.now() + timedelta(hours=1, minutes=40),
+        )
+
+        with self.check(
+            "First operational intent reference in area creation query succeeds",
+            self._pid,
+        ) as check:
+            try:
+                first_oir, subs, query = self._dss.put_op_intent(
+                    extents=first_oir_params.extents,
+                    key=first_oir_params.key,
+                    state=first_oir_params.state,
+                    base_url=first_oir_params.uss_base_url,
+                    oi_id=self._oir_ids[0],
+                )
+                self.record_query(query)
+                self._current_oirs[first_oir.id] = first_oir
+            except QueryError as qe:
+                self.record_queries(qe.queries)
+                check.record_failed(
+                    summary="Could not create first operational intent reference",
+                    details=f"Failed to create first operational intent reference with error code {qe.last_status_code}: {qe.msg}",
+                    query_timestamps=qe.query_timestamps,
+                )
+
+        self._current_oirs[first_oir.id] = first_oir
+
+        with self.check(
+            "Second, non-overlapping operational intent reference creation succeeds",
+            self._pid,
+        ) as check:
+            try:
+                second_oir, subs, query = self._dss.put_op_intent(
+                    extents=second_oir_params.extents,
+                    key=second_oir_params.key,
+                    state=second_oir_params.state,
+                    base_url=second_oir_params.uss_base_url,
+                    oi_id=self._oir_ids[1],
+                )
+                self.record_query(query)
+                self._current_oirs[second_oir.id] = second_oir
+            except QueryError as qe:
+                self.record_queries(qe.queries)
+                check.record_failed(
+                    summary="Could not create second non-overlapping operational intent reference",
+                    details=f"Failed to create second operational intent reference with error code {qe.last_status_code}: {qe.msg}",
+                    query_timestamps=qe.query_timestamps,
+                )
+
+        self._current_oirs[second_oir.id] = second_oir
+
+    def _attempt_creation_expect_conflict(
+        self, oir_params, conflicting_ids: List[EntityID]
+    ):
+        with self.check(
+            "Create operational intent reference with missing OVN fails", self._pid
+        ) as check:
+            try:
+                _, subs, q = self._dss.put_op_intent(
+                    extents=oir_params.extents,
+                    key=oir_params.key,
+                    state=oir_params.state,
+                    base_url=oir_params.uss_base_url,
+                    oi_id=self._oir_ids[2],
+                )
+                self.record_query(q)
+                check.record_failed(
+                    summary="Operational intent reference with OVN missing in key was created",
+                    details=f"Was expecting an HTTP 409 response because of a conflict with OIR {conflicting_ids}, but got a successful response ({q.status_code}) instead",
+                    query_timestamps=[q.request.timestamp],
+                )
+                return
+            except QueryError as qe:
+                self.record_queries(qe.queries)
+                _expect_conflict_code(check, conflicting_ids, qe.last_query)
+                conflicting_query = qe.last_query
+
+        self._validate_conflict_response(conflicting_ids, conflicting_query)
+
+    def _attempt_update_expect_conflict(
+        self, oir_params, conflicting_ids: List[EntityID], ovn: EntityID
+    ):
+        with self.check(
+            "Mutate operational intent reference with missing OVN fails", self._pid
+        ) as check:
+            try:
+                _, subs, q = self._dss.put_op_intent(
+                    extents=oir_params.extents,
+                    key=oir_params.key,
+                    state=oir_params.state,
+                    base_url=oir_params.uss_base_url,
+                    oi_id=self._oir_ids[2],
+                    ovn=ovn,
+                )
+                self.record_query(q)
+                check.record_failed(
+                    summary="Operational intent reference with OVN missing in key was mutated",
+                    details=f"Was expecting an HTTP 409 response because of a conflict with OIR {conflicting_ids}, but got a successful response ({q.status_code}) instead",
+                    query_timestamps=[q.request.timestamp],
+                )
+                return
+            except QueryError as qe:
+                self.record_queries(qe.queries)
+                _expect_conflict_code(check, conflicting_ids, qe.last_query)
+                conflicting_query = qe.last_query
+
+        self._validate_conflict_response(conflicting_ids, conflicting_query)
+
+    def _step_attempt_create_overlapping_oir(self):
+        first_oir = self._current_oirs[self._oir_ids[0]]
+        second_oir = self._current_oirs[self._oir_ids[1]]
+
+        conflict_first = self._planning_area.get_new_operational_intent_ref_params(
+            key=[],
+            state=OperationalIntentState.Accepted,
+            uss_base_url=self._planning_area.base_url,
+            time_start=first_oir.time_start.value.datetime,
+            time_end=first_oir.time_end.value.datetime,
+        )
+
+        self._attempt_creation_expect_conflict(conflict_first, [first_oir.id])
+
+        conflict_second = self._planning_area.get_new_operational_intent_ref_params(
+            key=[],
+            state=OperationalIntentState.Accepted,
+            uss_base_url=self._planning_area.base_url,
+            time_start=second_oir.time_start.value.datetime,
+            time_end=second_oir.time_end.value.datetime,
+        )
+
+        self._attempt_creation_expect_conflict(conflict_second, [second_oir.id])
+
+        conflict_both = self._planning_area.get_new_operational_intent_ref_params(
+            key=[],
+            state=OperationalIntentState.Accepted,
+            uss_base_url=self._planning_area.base_url,
+            time_start=first_oir.time_start.value.datetime,
+            time_end=second_oir.time_end.value.datetime,
+        )
+
+        self._attempt_creation_expect_conflict(
+            conflict_both, [first_oir.id, second_oir.id]
+        )
+
+        # Finally, we create the third OIR with the correct key, so we may try to mutate it at the next step
+        conflict_both.key = [first_oir.ovn, second_oir.ovn]
+
+        with self.check(
+            "Create operational intent reference with proper OVNs succeeds", self._pid
+        ) as check:
+            try:
+                third_oir, subs, q = self._dss.put_op_intent(
+                    extents=conflict_both.extents,
+                    key=conflict_both.key,
+                    state=conflict_both.state,
+                    base_url=conflict_both.uss_base_url,
+                    oi_id=self._oir_ids[2],
+                )
+                self.record_query(q)
+            except QueryError as qe:
+                self.record_queries(qe.queries)
+                check.record_failed(
+                    summary="Could not create operational intent reference with valid parameters",
+                    details=f"Failed to create third operational intent reference with error code {qe.last_status_code}: {qe.msg}",
+                    query_timestamps=qe.query_timestamps,
+                )
+                return
+
+        self._current_oirs[third_oir.id] = third_oir
+
+    def _validate_conflict_response(
+        self, conflicting_ids: List[EntityID], query: fetch.Query
+    ):
+        """Checks that the conflict response body is as specified.
+        If the missing_operational_intents field is defined, its content is checked against the list of passed conflicting ids."""
+
+        with self.check(
+            "Failure response due to conflict has proper format", self._pid
+        ) as check:
+            errors = schema_validation.validate(
+                F3548_21.OpenAPIPath,
+                F3548_21.AirspaceConflictResponse,
+                query.response.json,
+            )
+            if errors:
+                check.record_failed(
+                    summary="Conflict response body did not match OpenAPI schema",
+                    details=f"The following errors were found: {errors}",
+                    query_timestamps=[query.request.timestamp],
+                )
+                # Return in case the severity does not stop the test
+                return
+
+        parsed_response = query.parse_json_result(AirspaceConflictResponse)
+
+        # The OpenAPI spec does not seem to force implementations to return the missing operational intents:
+        # hence we only validate the content of that field if it is provided
+        if "missing_operational_intents" in parsed_response:
+            with self.check(
+                "Failure response due to conflict contains conflicting OIRs", self._pid
+            ) as check:
+                missing_oir_ids = [
+                    o.id for o in parsed_response.missing_operational_intents
+                ]
+                for expected_conflict_id in conflicting_ids:
+                    if expected_conflict_id not in missing_oir_ids:
+                        check.record_failed(
+                            summary="Expected conflicting OIR ID not in conflict response",
+                            details=f"Expected to find OIR ID {expected_conflict_id} in the missing operational intents list, but it was not found",
+                            query_timestamps=[query.request.timestamp],
+                        )
+
+    def _step_attempt_mutation_to_cause_overlap(self):
+        first_oir = self._current_oirs[self._oir_ids[0]]
+        second_oir = self._current_oirs[self._oir_ids[1]]
+        # We try to change the base URL, all else remains equal
+        oir_to_mutate = self._current_oirs[self._oir_ids[2]]
+        change_base_url = self._planning_area.get_new_operational_intent_ref_params(
+            key=[],
+            state=oir_to_mutate.state,
+            uss_base_url=oir_to_mutate.uss_base_url + "/mutated",
+            time_start=oir_to_mutate.time_start.value.datetime,
+            time_end=oir_to_mutate.time_end.value.datetime,
+        )
+
+        # If both OVns are missing:
+        self._attempt_update_expect_conflict(
+            change_base_url, [first_oir.id, second_oir.id], oir_to_mutate.ovn
+        )
+
+        # If the first OVN is missing:
+        change_base_url.key = [second_oir.ovn]
+        self._attempt_update_expect_conflict(
+            change_base_url, [first_oir.id], oir_to_mutate.ovn
+        )
+
+        # Try to overlap only with the first one
+        conflict_with_first = self._planning_area.get_new_operational_intent_ref_params(
+            key=[],
+            state=oir_to_mutate.state,
+            uss_base_url=oir_to_mutate.uss_base_url,
+            time_start=first_oir.time_start.value.datetime,
+            time_end=first_oir.time_end.value.datetime,
+        )
+
+        # We expect to conflict only with the first one
+        self._attempt_update_expect_conflict(
+            conflict_with_first, [first_oir.id], oir_to_mutate.ovn
+        )
+
+    def _setup_case(self):
+        self.begin_test_case("Setup")
+        # Multiple runs of the scenario seem to rely on the same instance of it:
+        # thus we need to reset the state of the scenario before running it.
+        self._current_oirs = {}
+        self.begin_test_step("Ensure clean workspace")
+        self._ensure_clean_workspace_step()
+        self.end_test_step()
+        self.end_test_case()
+
+    def _ensure_clean_workspace_step(self):
+
+        # Delete any active OIR we might own
+        test_step_fragments.cleanup_active_oirs(
+            self,
+            self._dss,
+            self._planning_area_volume4d.to_f3548v21(),
+            self._expected_manager,
+        )
+
+        # Make sure the OIR IDs we are going to use are available
+        for oir_id in self._oir_ids:
+            test_step_fragments.cleanup_op_intent(self, self._dss, oir_id)
+
+        # Also drop any subs we might own and that could interfere
+        test_step_fragments.cleanup_active_subs(
+            self, self._dss, self._planning_area_volume4d.to_f3548v21()
+        )
+
+    def cleanup(self):
+        self.begin_cleanup()
+        self._ensure_clean_workspace_step()
+        self.end_cleanup()
+
+
+def _expect_conflict_code(
+    check: PendingCheck, conflicting_ids: List[EntityID], query: fetch.Query
+):
+    if query.status_code != 409:
+        check.record_failed(
+            summary="OIR Creation failed for the unexpected reason",
+            details=f"Was expecting an HTTP 409 response because of a conflict with OIR {conflicting_ids}, but got a {query.status_code} instead",
+            query_timestamps=[query.request.timestamp],
+        )
diff --git a/monitoring/uss_qualifier/suites/astm/utm/dss_probing.md b/monitoring/uss_qualifier/suites/astm/utm/dss_probing.md
index 1df3720f41..050531e0fa 100644
--- a/monitoring/uss_qualifier/suites/astm/utm/dss_probing.md
+++ b/monitoring/uss_qualifier/suites/astm/utm/dss_probing.md
@@ -4,12 +4,13 @@
 
 ## [Actions](../../README.md#actions)
 
-1. Scenario: [ASTM SCD DSS: Subscription Simple](../../../scenarios/astm/utm/dss/subscription_simple.md) ([`scenarios.astm.utm.dss.SubscriptionSimple`](../../../scenarios/astm/utm/dss/subscription_simple.py))
-2. Scenario: [ASTM SCD DSS: Subscription Validation](../../../scenarios/astm/utm/dss/subscription_validation.md) ([`scenarios.astm.utm.dss.SubscriptionValidation`](../../../scenarios/astm/utm/dss/subscription_validation.py))
-3. Scenario: [ASTM F3548-21 UTM DSS Operational Intent Reference Access Control](../../../scenarios/astm/utm/op_intent_ref_access_control.md) ([`scenarios.astm.utm.OpIntentReferenceAccessControl`](../../../scenarios/astm/utm/op_intent_ref_access_control.py))
-4. Scenario: [ASTM F3548-21 UTM DSS interoperability](../../../scenarios/astm/utm/dss_interoperability.md) ([`scenarios.astm.utm.DSSInteroperability`](../../../scenarios/astm/utm/dss_interoperability.py))
-5. Scenario: [ASTM SCD DSS: Subscription Synchronization](../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md) ([`scenarios.astm.utm.dss.synchronization.SubscriptionSynchronization`](../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.py))
-6. Scenario: [ASTM UTM DSS: Direct CRDB access](../../../scenarios/astm/utm/dss/crdb_access.md) ([`scenarios.astm.utm.dss.CRDBAccess`](../../../scenarios/astm/utm/dss/crdb_access.py))
+1. Scenario: [ASTM SCD DSS: Operational Intent Reference Key Validation](../../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md) ([`scenarios.astm.utm.dss.OIRKeyValidation`](../../../scenarios/astm/utm/dss/op_intent_ref_key_validation.py))
+2. Scenario: [ASTM SCD DSS: Subscription Simple](../../../scenarios/astm/utm/dss/subscription_simple.md) ([`scenarios.astm.utm.dss.SubscriptionSimple`](../../../scenarios/astm/utm/dss/subscription_simple.py))
+3. Scenario: [ASTM SCD DSS: Subscription Validation](../../../scenarios/astm/utm/dss/subscription_validation.md) ([`scenarios.astm.utm.dss.SubscriptionValidation`](../../../scenarios/astm/utm/dss/subscription_validation.py))
+4. Scenario: [ASTM F3548-21 UTM DSS Operational Intent Reference Access Control](../../../scenarios/astm/utm/op_intent_ref_access_control.md) ([`scenarios.astm.utm.OpIntentReferenceAccessControl`](../../../scenarios/astm/utm/op_intent_ref_access_control.py))
+5. Scenario: [ASTM F3548-21 UTM DSS interoperability](../../../scenarios/astm/utm/dss_interoperability.md) ([`scenarios.astm.utm.DSSInteroperability`](../../../scenarios/astm/utm/dss_interoperability.py))
+6. Scenario: [ASTM SCD DSS: Subscription Synchronization](../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md) ([`scenarios.astm.utm.dss.synchronization.SubscriptionSynchronization`](../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.py))
+7. Scenario: [ASTM UTM DSS: Direct CRDB access](../../../scenarios/astm/utm/dss/crdb_access.md) ([`scenarios.astm.utm.dss.CRDBAccess`](../../../scenarios/astm/utm/dss/crdb_access.py))
 
 ## [Checked requirements](../../README.md#checked-requirements)
 
@@ -21,20 +22,20 @@
     <th><a href="../../README.md#checked-in">Checked in</a></th>
   </tr>
   <tr>
-    <td rowspan="15" style="vertical-align:top;"><a href="../../../requirements/astm/f3548/v21.md">astm<br>.f3548<br>.v21</a></td>
+    <td rowspan="17" style="vertical-align:top;"><a href="../../../requirements/astm/f3548/v21.md">astm<br>.f3548<br>.v21</a></td>
     <td><a href="../../../requirements/astm/f3548/v21.md">DSS0005,1</a></td>
     <td>Implemented</td>
-    <td><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a></td>
+    <td><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a></td>
   </tr>
   <tr>
     <td><a href="../../../requirements/astm/f3548/v21.md">DSS0005,2</a></td>
     <td>Implemented</td>
-    <td><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a></td>
+    <td><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a></td>
   </tr>
   <tr>
     <td><a href="../../../requirements/astm/f3548/v21.md">DSS0005,5</a></td>
     <td>Implemented</td>
-    <td><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a></td>
+    <td><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a></td>
   </tr>
   <tr>
     <td><a href="../../../requirements/astm/f3548/v21.md">DSS0015</a></td>
@@ -86,6 +87,16 @@
     <td>Implemented</td>
     <td><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a></td>
   </tr>
+  <tr>
+    <td><a href="../../../requirements/astm/f3548/v21.md">DSS0210,A2-7-2,2a</a></td>
+    <td>Implemented</td>
+    <td><a href="../../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a></td>
+  </tr>
+  <tr>
+    <td><a href="../../../requirements/astm/f3548/v21.md">DSS0210,A2-7-2,2b</a></td>
+    <td>Implemented</td>
+    <td><a href="../../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a></td>
+  </tr>
   <tr>
     <td><a href="../../../requirements/astm/f3548/v21.md">DSS0300</a></td>
     <td>Implemented</td>
diff --git a/monitoring/uss_qualifier/suites/astm/utm/dss_probing.yaml b/monitoring/uss_qualifier/suites/astm/utm/dss_probing.yaml
index 46b4fbb4b1..c51b28f1e7 100644
--- a/monitoring/uss_qualifier/suites/astm/utm/dss_probing.yaml
+++ b/monitoring/uss_qualifier/suites/astm/utm/dss_probing.yaml
@@ -1,6 +1,7 @@
 name: DSS testing for ASTM NetRID F3548-21
 resources:
   dss: resources.astm.f3548.v21.DSSInstanceResource
+  utm_client_identity: resources.communications.ClientIdentityResource
   second_utm_auth: resources.communications.AuthAdapterResource?
   all_dss_instances: resources.astm.f3548.v21.DSSInstancesResource?
   dss_crdb_cluster: resources.interuss.crdb.CockroachDBClusterResource?
@@ -9,6 +10,13 @@ resources:
   planning_area: resources.astm.f3548.v21.PlanningAreaResource
   problematically_big_area: resources.VerticesResource
 actions:
+  - test_scenario:
+      scenario_type: scenarios.astm.utm.dss.OIRKeyValidation
+      resources:
+        dss: dss
+        id_generator: id_generator
+        client_identity: utm_client_identity
+        planning_area: planning_area
   - test_scenario:
       scenario_type: scenarios.astm.utm.dss.SubscriptionSimple
       resources:
diff --git a/monitoring/uss_qualifier/suites/astm/utm/f3548_21.md b/monitoring/uss_qualifier/suites/astm/utm/f3548_21.md
index e87ee41956..7097cdcda7 100644
--- a/monitoring/uss_qualifier/suites/astm/utm/f3548_21.md
+++ b/monitoring/uss_qualifier/suites/astm/utm/f3548_21.md
@@ -35,20 +35,20 @@
     <th><a href="../../README.md#checked-in">Checked in</a></th>
   </tr>
   <tr>
-    <td rowspan="41" style="vertical-align:top;"><a href="../../../requirements/astm/f3548/v21.md">astm<br>.f3548<br>.v21</a></td>
+    <td rowspan="43" style="vertical-align:top;"><a href="../../../requirements/astm/f3548/v21.md">astm<br>.f3548<br>.v21</a></td>
     <td><a href="../../../requirements/astm/f3548/v21.md">DSS0005,1</a></td>
     <td>Implemented</td>
-    <td><a href="../../../scenarios/astm/utm/prep_planners.md">ASTM F3548 flight planners preparation</a><br><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a><br><a href="../../../scenarios/astm/utm/off_nominal_planning/down_uss.md">Off-Nominal planning: down USS</a><br><a href="../../../scenarios/astm/utm/off_nominal_planning/down_uss_equal_priority_not_permitted.md">Off-Nominal planning: down USS with equal priority conflicts not permitted</a></td>
+    <td><a href="../../../scenarios/astm/utm/prep_planners.md">ASTM F3548 flight planners preparation</a><br><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a><br><a href="../../../scenarios/astm/utm/off_nominal_planning/down_uss.md">Off-Nominal planning: down USS</a><br><a href="../../../scenarios/astm/utm/off_nominal_planning/down_uss_equal_priority_not_permitted.md">Off-Nominal planning: down USS with equal priority conflicts not permitted</a></td>
   </tr>
   <tr>
     <td><a href="../../../requirements/astm/f3548/v21.md">DSS0005,2</a></td>
     <td>Implemented</td>
-    <td><a href="../../../scenarios/astm/utm/prep_planners.md">ASTM F3548 flight planners preparation</a><br><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a><br><a href="../../../scenarios/astm/utm/subscription_notifications/receive_notifications_for_awareness/receive_notifications_for_awareness.md">Awareness of relevant operational intents</a><br><a href="../../../scenarios/astm/utm/data_exchange_validation/get_op_data_validation.md">Data Validation of GET operational intents by USS</a><br><a href="../../../scenarios/astm/utm/nominal_planning/conflict_higher_priority/conflict_higher_priority.md">Nominal planning: conflict with higher priority</a><br><a href="../../../scenarios/astm/utm/nominal_planning/conflict_equal_priority_not_permitted/conflict_equal_priority_not_permitted.md">Nominal planning: not permitted conflict with equal priority</a><br><a href="../../../scenarios/astm/utm/off_nominal_planning/down_uss.md">Off-Nominal planning: down USS</a><br><a href="../../../scenarios/astm/utm/off_nominal_planning/down_uss_equal_priority_not_permitted.md">Off-Nominal planning: down USS with equal priority conflicts not permitted</a><br><a href="../../../scenarios/astm/utm/flight_intent_validation/flight_intent_validation.md">Validation of operational intents</a></td>
+    <td><a href="../../../scenarios/astm/utm/prep_planners.md">ASTM F3548 flight planners preparation</a><br><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a><br><a href="../../../scenarios/astm/utm/subscription_notifications/receive_notifications_for_awareness/receive_notifications_for_awareness.md">Awareness of relevant operational intents</a><br><a href="../../../scenarios/astm/utm/data_exchange_validation/get_op_data_validation.md">Data Validation of GET operational intents by USS</a><br><a href="../../../scenarios/astm/utm/nominal_planning/conflict_higher_priority/conflict_higher_priority.md">Nominal planning: conflict with higher priority</a><br><a href="../../../scenarios/astm/utm/nominal_planning/conflict_equal_priority_not_permitted/conflict_equal_priority_not_permitted.md">Nominal planning: not permitted conflict with equal priority</a><br><a href="../../../scenarios/astm/utm/off_nominal_planning/down_uss.md">Off-Nominal planning: down USS</a><br><a href="../../../scenarios/astm/utm/off_nominal_planning/down_uss_equal_priority_not_permitted.md">Off-Nominal planning: down USS with equal priority conflicts not permitted</a><br><a href="../../../scenarios/astm/utm/flight_intent_validation/flight_intent_validation.md">Validation of operational intents</a></td>
   </tr>
   <tr>
     <td><a href="../../../requirements/astm/f3548/v21.md">DSS0005,5</a></td>
     <td>Implemented</td>
-    <td><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a></td>
+    <td><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a></td>
   </tr>
   <tr>
     <td><a href="../../../requirements/astm/f3548/v21.md">DSS0015</a></td>
@@ -105,6 +105,16 @@
     <td>Implemented</td>
     <td><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a></td>
   </tr>
+  <tr>
+    <td><a href="../../../requirements/astm/f3548/v21.md">DSS0210,A2-7-2,2a</a></td>
+    <td>Implemented</td>
+    <td><a href="../../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a></td>
+  </tr>
+  <tr>
+    <td><a href="../../../requirements/astm/f3548/v21.md">DSS0210,A2-7-2,2b</a></td>
+    <td>Implemented</td>
+    <td><a href="../../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a></td>
+  </tr>
   <tr>
     <td><a href="../../../requirements/astm/f3548/v21.md">DSS0300</a></td>
     <td>Implemented</td>
diff --git a/monitoring/uss_qualifier/suites/astm/utm/f3548_21.yaml b/monitoring/uss_qualifier/suites/astm/utm/f3548_21.yaml
index 88cbe33c9f..c4db0b35f5 100644
--- a/monitoring/uss_qualifier/suites/astm/utm/f3548_21.yaml
+++ b/monitoring/uss_qualifier/suites/astm/utm/f3548_21.yaml
@@ -15,6 +15,7 @@ resources:
   second_utm_auth: resources.communications.AuthAdapterResource?
   mock_uss: resources.interuss.mock_uss.client.MockUSSResource?
   id_generator: resources.interuss.IDGeneratorResource
+  utm_client_identity: resources.communications.ClientIdentityResource
   planning_area: resources.astm.f3548.v21.PlanningAreaResource
   problematically_big_area: resources.VerticesResource
   system_identity: resources.versioning.SystemIdentityResource?
@@ -49,6 +50,7 @@ actions:
       second_utm_auth: second_utm_auth?
       flight_intents: non_conflicting_flights
       id_generator: id_generator
+      utm_client_identity: utm_client_identity
       planning_area: planning_area
       problematically_big_area: problematically_big_area
     specification:
diff --git a/monitoring/uss_qualifier/suites/faa/uft/message_signing.md b/monitoring/uss_qualifier/suites/faa/uft/message_signing.md
index f21a93d9ed..1f24ed6e8e 100644
--- a/monitoring/uss_qualifier/suites/faa/uft/message_signing.md
+++ b/monitoring/uss_qualifier/suites/faa/uft/message_signing.md
@@ -18,20 +18,20 @@
     <th><a href="../../README.md#checked-in">Checked in</a></th>
   </tr>
   <tr>
-    <td rowspan="41" style="vertical-align:top;"><a href="../../../requirements/astm/f3548/v21.md">astm<br>.f3548<br>.v21</a></td>
+    <td rowspan="43" style="vertical-align:top;"><a href="../../../requirements/astm/f3548/v21.md">astm<br>.f3548<br>.v21</a></td>
     <td><a href="../../../requirements/astm/f3548/v21.md">DSS0005,1</a></td>
     <td>Implemented</td>
-    <td><a href="../../../scenarios/astm/utm/prep_planners.md">ASTM F3548 flight planners preparation</a><br><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a><br><a href="../../../scenarios/astm/utm/off_nominal_planning/down_uss.md">Off-Nominal planning: down USS</a><br><a href="../../../scenarios/astm/utm/off_nominal_planning/down_uss_equal_priority_not_permitted.md">Off-Nominal planning: down USS with equal priority conflicts not permitted</a></td>
+    <td><a href="../../../scenarios/astm/utm/prep_planners.md">ASTM F3548 flight planners preparation</a><br><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a><br><a href="../../../scenarios/astm/utm/off_nominal_planning/down_uss.md">Off-Nominal planning: down USS</a><br><a href="../../../scenarios/astm/utm/off_nominal_planning/down_uss_equal_priority_not_permitted.md">Off-Nominal planning: down USS with equal priority conflicts not permitted</a></td>
   </tr>
   <tr>
     <td><a href="../../../requirements/astm/f3548/v21.md">DSS0005,2</a></td>
     <td>Implemented</td>
-    <td><a href="../../../scenarios/astm/utm/prep_planners.md">ASTM F3548 flight planners preparation</a><br><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a><br><a href="../../../scenarios/astm/utm/subscription_notifications/receive_notifications_for_awareness/receive_notifications_for_awareness.md">Awareness of relevant operational intents</a><br><a href="../../../scenarios/astm/utm/data_exchange_validation/get_op_data_validation.md">Data Validation of GET operational intents by USS</a><br><a href="../../../scenarios/astm/utm/nominal_planning/conflict_higher_priority/conflict_higher_priority.md">Nominal planning: conflict with higher priority</a><br><a href="../../../scenarios/astm/utm/nominal_planning/conflict_equal_priority_not_permitted/conflict_equal_priority_not_permitted.md">Nominal planning: not permitted conflict with equal priority</a><br><a href="../../../scenarios/astm/utm/off_nominal_planning/down_uss.md">Off-Nominal planning: down USS</a><br><a href="../../../scenarios/astm/utm/off_nominal_planning/down_uss_equal_priority_not_permitted.md">Off-Nominal planning: down USS with equal priority conflicts not permitted</a><br><a href="../../../scenarios/astm/utm/flight_intent_validation/flight_intent_validation.md">Validation of operational intents</a></td>
+    <td><a href="../../../scenarios/astm/utm/prep_planners.md">ASTM F3548 flight planners preparation</a><br><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a><br><a href="../../../scenarios/astm/utm/subscription_notifications/receive_notifications_for_awareness/receive_notifications_for_awareness.md">Awareness of relevant operational intents</a><br><a href="../../../scenarios/astm/utm/data_exchange_validation/get_op_data_validation.md">Data Validation of GET operational intents by USS</a><br><a href="../../../scenarios/astm/utm/nominal_planning/conflict_higher_priority/conflict_higher_priority.md">Nominal planning: conflict with higher priority</a><br><a href="../../../scenarios/astm/utm/nominal_planning/conflict_equal_priority_not_permitted/conflict_equal_priority_not_permitted.md">Nominal planning: not permitted conflict with equal priority</a><br><a href="../../../scenarios/astm/utm/off_nominal_planning/down_uss.md">Off-Nominal planning: down USS</a><br><a href="../../../scenarios/astm/utm/off_nominal_planning/down_uss_equal_priority_not_permitted.md">Off-Nominal planning: down USS with equal priority conflicts not permitted</a><br><a href="../../../scenarios/astm/utm/flight_intent_validation/flight_intent_validation.md">Validation of operational intents</a></td>
   </tr>
   <tr>
     <td><a href="../../../requirements/astm/f3548/v21.md">DSS0005,5</a></td>
     <td>Implemented</td>
-    <td><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a></td>
+    <td><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a></td>
   </tr>
   <tr>
     <td><a href="../../../requirements/astm/f3548/v21.md">DSS0015</a></td>
@@ -88,6 +88,16 @@
     <td>Implemented</td>
     <td><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a></td>
   </tr>
+  <tr>
+    <td><a href="../../../requirements/astm/f3548/v21.md">DSS0210,A2-7-2,2a</a></td>
+    <td>Implemented</td>
+    <td><a href="../../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a></td>
+  </tr>
+  <tr>
+    <td><a href="../../../requirements/astm/f3548/v21.md">DSS0210,A2-7-2,2b</a></td>
+    <td>Implemented</td>
+    <td><a href="../../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a></td>
+  </tr>
   <tr>
     <td><a href="../../../requirements/astm/f3548/v21.md">DSS0300</a></td>
     <td>Implemented</td>
diff --git a/monitoring/uss_qualifier/suites/faa/uft/message_signing.yaml b/monitoring/uss_qualifier/suites/faa/uft/message_signing.yaml
index f3a4766e2b..6483275157 100644
--- a/monitoring/uss_qualifier/suites/faa/uft/message_signing.yaml
+++ b/monitoring/uss_qualifier/suites/faa/uft/message_signing.yaml
@@ -11,6 +11,7 @@ resources:
   priority_preemption_flights: resources.flight_planning.FlightIntentsResource
   invalid_flight_intents: resources.flight_planning.FlightIntentsResource
   id_generator: resources.interuss.IDGeneratorResource
+  utm_client_identity: resources.communications.ClientIdentityResource
   second_utm_auth: resources.communications.AuthAdapterResource?
   planning_area: resources.astm.f3548.v21.PlanningAreaResource
   problematically_big_area: resources.VerticesResource
@@ -35,6 +36,7 @@ actions:
       dss_instances: dss_instances
       dss_crdb_cluster: dss_crdb_cluster?
       id_generator: id_generator
+      utm_client_identity: utm_client_identity
       second_utm_auth: second_utm_auth
       planning_area: planning_area
       problematically_big_area: problematically_big_area
diff --git a/monitoring/uss_qualifier/suites/interuss/dss/all_tests.md b/monitoring/uss_qualifier/suites/interuss/dss/all_tests.md
index 1fb77d6395..b606909023 100644
--- a/monitoring/uss_qualifier/suites/interuss/dss/all_tests.md
+++ b/monitoring/uss_qualifier/suites/interuss/dss/all_tests.md
@@ -408,20 +408,20 @@
     <td><a href="../../../scenarios/astm/netrid/v22a/dss/heavy_traffic_concurrent.md">ASTM NetRID DSS: Concurrent Requests</a><br><a href="../../../scenarios/astm/netrid/v22a/dss/isa_expiry.md">ASTM NetRID DSS: ISA Expiry</a><br><a href="../../../scenarios/astm/netrid/v22a/dss/isa_subscription_interactions.md">ASTM NetRID DSS: ISA Subscription Interactions</a><br><a href="../../../scenarios/astm/netrid/v22a/dss/isa_simple.md">ASTM NetRID DSS: Simple ISA</a><br><a href="../../../scenarios/astm/netrid/v22a/dss/isa_validation.md">ASTM NetRID DSS: Submitted ISA Validations</a><br><a href="../../../scenarios/astm/netrid/v22a/dss/subscription_simple.md">ASTM NetRID DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/netrid/v22a/dss/subscription_validation.md">ASTM NetRID DSS: Subscription Validation</a><br><a href="../../../scenarios/astm/netrid/v22a/dss/token_validation.md">ASTM NetRID DSS: Token Validation</a></td>
   </tr>
   <tr>
-    <td rowspan="15" style="vertical-align:top;"><a href="../../../requirements/astm/f3548/v21.md">astm<br>.f3548<br>.v21</a></td>
+    <td rowspan="17" style="vertical-align:top;"><a href="../../../requirements/astm/f3548/v21.md">astm<br>.f3548<br>.v21</a></td>
     <td><a href="../../../requirements/astm/f3548/v21.md">DSS0005,1</a></td>
     <td>Implemented</td>
-    <td><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a></td>
+    <td><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a></td>
   </tr>
   <tr>
     <td><a href="../../../requirements/astm/f3548/v21.md">DSS0005,2</a></td>
     <td>Implemented</td>
-    <td><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a></td>
+    <td><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a></td>
   </tr>
   <tr>
     <td><a href="../../../requirements/astm/f3548/v21.md">DSS0005,5</a></td>
     <td>Implemented</td>
-    <td><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a></td>
+    <td><a href="../../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a><br><a href="../../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a></td>
   </tr>
   <tr>
     <td><a href="../../../requirements/astm/f3548/v21.md">DSS0015</a></td>
@@ -473,6 +473,16 @@
     <td>Implemented</td>
     <td><a href="../../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a></td>
   </tr>
+  <tr>
+    <td><a href="../../../requirements/astm/f3548/v21.md">DSS0210,A2-7-2,2a</a></td>
+    <td>Implemented</td>
+    <td><a href="../../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a></td>
+  </tr>
+  <tr>
+    <td><a href="../../../requirements/astm/f3548/v21.md">DSS0210,A2-7-2,2b</a></td>
+    <td>Implemented</td>
+    <td><a href="../../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a></td>
+  </tr>
   <tr>
     <td><a href="../../../requirements/astm/f3548/v21.md">DSS0300</a></td>
     <td>Implemented</td>
diff --git a/monitoring/uss_qualifier/suites/uspace/flight_auth.md b/monitoring/uss_qualifier/suites/uspace/flight_auth.md
index 524de3c54c..f0d9059e7f 100644
--- a/monitoring/uss_qualifier/suites/uspace/flight_auth.md
+++ b/monitoring/uss_qualifier/suites/uspace/flight_auth.md
@@ -19,20 +19,20 @@
     <th><a href="../README.md#checked-in">Checked in</a></th>
   </tr>
   <tr>
-    <td rowspan="41" style="vertical-align:top;"><a href="../../requirements/astm/f3548/v21.md">astm<br>.f3548<br>.v21</a></td>
+    <td rowspan="43" style="vertical-align:top;"><a href="../../requirements/astm/f3548/v21.md">astm<br>.f3548<br>.v21</a></td>
     <td><a href="../../requirements/astm/f3548/v21.md">DSS0005,1</a></td>
     <td>Implemented</td>
-    <td><a href="../../scenarios/astm/utm/prep_planners.md">ASTM F3548 flight planners preparation</a><br><a href="../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a><br><a href="../../scenarios/astm/utm/off_nominal_planning/down_uss.md">Off-Nominal planning: down USS</a><br><a href="../../scenarios/astm/utm/off_nominal_planning/down_uss_equal_priority_not_permitted.md">Off-Nominal planning: down USS with equal priority conflicts not permitted</a></td>
+    <td><a href="../../scenarios/astm/utm/prep_planners.md">ASTM F3548 flight planners preparation</a><br><a href="../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a><br><a href="../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a><br><a href="../../scenarios/astm/utm/off_nominal_planning/down_uss.md">Off-Nominal planning: down USS</a><br><a href="../../scenarios/astm/utm/off_nominal_planning/down_uss_equal_priority_not_permitted.md">Off-Nominal planning: down USS with equal priority conflicts not permitted</a></td>
   </tr>
   <tr>
     <td><a href="../../requirements/astm/f3548/v21.md">DSS0005,2</a></td>
     <td>Implemented</td>
-    <td><a href="../../scenarios/astm/utm/prep_planners.md">ASTM F3548 flight planners preparation</a><br><a href="../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a><br><a href="../../scenarios/astm/utm/subscription_notifications/receive_notifications_for_awareness/receive_notifications_for_awareness.md">Awareness of relevant operational intents</a><br><a href="../../scenarios/astm/utm/data_exchange_validation/get_op_data_validation.md">Data Validation of GET operational intents by USS</a><br><a href="../../scenarios/astm/utm/nominal_planning/conflict_higher_priority/conflict_higher_priority.md">Nominal planning: conflict with higher priority</a><br><a href="../../scenarios/astm/utm/nominal_planning/conflict_equal_priority_not_permitted/conflict_equal_priority_not_permitted.md">Nominal planning: not permitted conflict with equal priority</a><br><a href="../../scenarios/astm/utm/off_nominal_planning/down_uss.md">Off-Nominal planning: down USS</a><br><a href="../../scenarios/astm/utm/off_nominal_planning/down_uss_equal_priority_not_permitted.md">Off-Nominal planning: down USS with equal priority conflicts not permitted</a><br><a href="../../scenarios/astm/utm/flight_intent_validation/flight_intent_validation.md">Validation of operational intents</a></td>
+    <td><a href="../../scenarios/astm/utm/prep_planners.md">ASTM F3548 flight planners preparation</a><br><a href="../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a><br><a href="../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a><br><a href="../../scenarios/astm/utm/subscription_notifications/receive_notifications_for_awareness/receive_notifications_for_awareness.md">Awareness of relevant operational intents</a><br><a href="../../scenarios/astm/utm/data_exchange_validation/get_op_data_validation.md">Data Validation of GET operational intents by USS</a><br><a href="../../scenarios/astm/utm/nominal_planning/conflict_higher_priority/conflict_higher_priority.md">Nominal planning: conflict with higher priority</a><br><a href="../../scenarios/astm/utm/nominal_planning/conflict_equal_priority_not_permitted/conflict_equal_priority_not_permitted.md">Nominal planning: not permitted conflict with equal priority</a><br><a href="../../scenarios/astm/utm/off_nominal_planning/down_uss.md">Off-Nominal planning: down USS</a><br><a href="../../scenarios/astm/utm/off_nominal_planning/down_uss_equal_priority_not_permitted.md">Off-Nominal planning: down USS with equal priority conflicts not permitted</a><br><a href="../../scenarios/astm/utm/flight_intent_validation/flight_intent_validation.md">Validation of operational intents</a></td>
   </tr>
   <tr>
     <td><a href="../../requirements/astm/f3548/v21.md">DSS0005,5</a></td>
     <td>Implemented</td>
-    <td><a href="../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a></td>
+    <td><a href="../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a><br><a href="../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a></td>
   </tr>
   <tr>
     <td><a href="../../requirements/astm/f3548/v21.md">DSS0015</a></td>
@@ -89,6 +89,16 @@
     <td>Implemented</td>
     <td><a href="../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a></td>
   </tr>
+  <tr>
+    <td><a href="../../requirements/astm/f3548/v21.md">DSS0210,A2-7-2,2a</a></td>
+    <td>Implemented</td>
+    <td><a href="../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a></td>
+  </tr>
+  <tr>
+    <td><a href="../../requirements/astm/f3548/v21.md">DSS0210,A2-7-2,2b</a></td>
+    <td>Implemented</td>
+    <td><a href="../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a></td>
+  </tr>
   <tr>
     <td><a href="../../requirements/astm/f3548/v21.md">DSS0300</a></td>
     <td>Implemented</td>
diff --git a/monitoring/uss_qualifier/suites/uspace/required_services.md b/monitoring/uss_qualifier/suites/uspace/required_services.md
index c24c5e1eba..0cec8ee019 100644
--- a/monitoring/uss_qualifier/suites/uspace/required_services.md
+++ b/monitoring/uss_qualifier/suites/uspace/required_services.md
@@ -454,20 +454,20 @@
     <td><a href="../../scenarios/astm/netrid/v22a/dss/heavy_traffic_concurrent.md">ASTM NetRID DSS: Concurrent Requests</a><br><a href="../../scenarios/astm/netrid/v22a/dss/isa_expiry.md">ASTM NetRID DSS: ISA Expiry</a><br><a href="../../scenarios/astm/netrid/v22a/dss/isa_subscription_interactions.md">ASTM NetRID DSS: ISA Subscription Interactions</a><br><a href="../../scenarios/astm/netrid/v22a/dss/isa_simple.md">ASTM NetRID DSS: Simple ISA</a><br><a href="../../scenarios/astm/netrid/v22a/dss/isa_validation.md">ASTM NetRID DSS: Submitted ISA Validations</a><br><a href="../../scenarios/astm/netrid/v22a/dss/subscription_simple.md">ASTM NetRID DSS: Subscription Simple</a><br><a href="../../scenarios/astm/netrid/v22a/dss/subscription_validation.md">ASTM NetRID DSS: Subscription Validation</a><br><a href="../../scenarios/astm/netrid/v22a/dss/token_validation.md">ASTM NetRID DSS: Token Validation</a></td>
   </tr>
   <tr>
-    <td rowspan="41" style="vertical-align:top;"><a href="../../requirements/astm/f3548/v21.md">astm<br>.f3548<br>.v21</a></td>
+    <td rowspan="43" style="vertical-align:top;"><a href="../../requirements/astm/f3548/v21.md">astm<br>.f3548<br>.v21</a></td>
     <td><a href="../../requirements/astm/f3548/v21.md">DSS0005,1</a></td>
     <td>Implemented</td>
-    <td><a href="../../scenarios/astm/utm/prep_planners.md">ASTM F3548 flight planners preparation</a><br><a href="../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a><br><a href="../../scenarios/astm/utm/off_nominal_planning/down_uss.md">Off-Nominal planning: down USS</a><br><a href="../../scenarios/astm/utm/off_nominal_planning/down_uss_equal_priority_not_permitted.md">Off-Nominal planning: down USS with equal priority conflicts not permitted</a></td>
+    <td><a href="../../scenarios/astm/utm/prep_planners.md">ASTM F3548 flight planners preparation</a><br><a href="../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a><br><a href="../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a><br><a href="../../scenarios/astm/utm/off_nominal_planning/down_uss.md">Off-Nominal planning: down USS</a><br><a href="../../scenarios/astm/utm/off_nominal_planning/down_uss_equal_priority_not_permitted.md">Off-Nominal planning: down USS with equal priority conflicts not permitted</a></td>
   </tr>
   <tr>
     <td><a href="../../requirements/astm/f3548/v21.md">DSS0005,2</a></td>
     <td>Implemented</td>
-    <td><a href="../../scenarios/astm/utm/prep_planners.md">ASTM F3548 flight planners preparation</a><br><a href="../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a><br><a href="../../scenarios/astm/utm/subscription_notifications/receive_notifications_for_awareness/receive_notifications_for_awareness.md">Awareness of relevant operational intents</a><br><a href="../../scenarios/astm/utm/data_exchange_validation/get_op_data_validation.md">Data Validation of GET operational intents by USS</a><br><a href="../../scenarios/astm/utm/nominal_planning/conflict_higher_priority/conflict_higher_priority.md">Nominal planning: conflict with higher priority</a><br><a href="../../scenarios/astm/utm/nominal_planning/conflict_equal_priority_not_permitted/conflict_equal_priority_not_permitted.md">Nominal planning: not permitted conflict with equal priority</a><br><a href="../../scenarios/astm/utm/off_nominal_planning/down_uss.md">Off-Nominal planning: down USS</a><br><a href="../../scenarios/astm/utm/off_nominal_planning/down_uss_equal_priority_not_permitted.md">Off-Nominal planning: down USS with equal priority conflicts not permitted</a><br><a href="../../scenarios/astm/utm/flight_intent_validation/flight_intent_validation.md">Validation of operational intents</a></td>
+    <td><a href="../../scenarios/astm/utm/prep_planners.md">ASTM F3548 flight planners preparation</a><br><a href="../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a><br><a href="../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a><br><a href="../../scenarios/astm/utm/subscription_notifications/receive_notifications_for_awareness/receive_notifications_for_awareness.md">Awareness of relevant operational intents</a><br><a href="../../scenarios/astm/utm/data_exchange_validation/get_op_data_validation.md">Data Validation of GET operational intents by USS</a><br><a href="../../scenarios/astm/utm/nominal_planning/conflict_higher_priority/conflict_higher_priority.md">Nominal planning: conflict with higher priority</a><br><a href="../../scenarios/astm/utm/nominal_planning/conflict_equal_priority_not_permitted/conflict_equal_priority_not_permitted.md">Nominal planning: not permitted conflict with equal priority</a><br><a href="../../scenarios/astm/utm/off_nominal_planning/down_uss.md">Off-Nominal planning: down USS</a><br><a href="../../scenarios/astm/utm/off_nominal_planning/down_uss_equal_priority_not_permitted.md">Off-Nominal planning: down USS with equal priority conflicts not permitted</a><br><a href="../../scenarios/astm/utm/flight_intent_validation/flight_intent_validation.md">Validation of operational intents</a></td>
   </tr>
   <tr>
     <td><a href="../../requirements/astm/f3548/v21.md">DSS0005,5</a></td>
     <td>Implemented</td>
-    <td><a href="../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a></td>
+    <td><a href="../../scenarios/astm/utm/op_intent_ref_access_control.md">ASTM F3548-21 UTM DSS Operational Intent Reference Access Control</a><br><a href="../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a><br><a href="../../scenarios/astm/utm/dss/subscription_simple.md">ASTM SCD DSS: Subscription Simple</a><br><a href="../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a><br><a href="../../scenarios/astm/utm/dss/subscription_validation.md">ASTM SCD DSS: Subscription Validation</a></td>
   </tr>
   <tr>
     <td><a href="../../requirements/astm/f3548/v21.md">DSS0015</a></td>
@@ -524,6 +524,16 @@
     <td>Implemented</td>
     <td><a href="../../scenarios/astm/utm/dss/synchronization/subscription_synchronization.md">ASTM SCD DSS: Subscription Synchronization</a></td>
   </tr>
+  <tr>
+    <td><a href="../../requirements/astm/f3548/v21.md">DSS0210,A2-7-2,2a</a></td>
+    <td>Implemented</td>
+    <td><a href="../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a></td>
+  </tr>
+  <tr>
+    <td><a href="../../requirements/astm/f3548/v21.md">DSS0210,A2-7-2,2b</a></td>
+    <td>Implemented</td>
+    <td><a href="../../scenarios/astm/utm/dss/op_intent_ref_key_validation.md">ASTM SCD DSS: Operational Intent Reference Key Validation</a></td>
+  </tr>
   <tr>
     <td><a href="../../requirements/astm/f3548/v21.md">DSS0300</a></td>
     <td>Implemented</td>