diff --git a/code/API_definitions/network-access-management.yaml b/code/API_definitions/network-access-management.yaml
index e286b74..ab9e7dc 100644
--- a/code/API_definitions/network-access-management.yaml
+++ b/code/API_definitions/network-access-management.yaml
@@ -128,6 +128,15 @@ info:
     may be used.  If an end-user replaces the equipment, all existing isolated networks SHOULD be synced to the new
     device representing this mesh.  Alternatively, a synthetic hardware address may also be used if the specification
     for the address type allows.
+
+    # Additional CAMARA error responses
+
+    The list of error codes in this API specification is not exhaustive. Therefore the API specification may not document some non-mandatory error statuses as indicated in `CAMARA API Design Guide`.
+
+    Please refer to the `CAMARA_common.yaml` of the Commonalities Release associated to this API version for a complete list of error responses. The applicable Commonalities Release can be identified in the `API Readiness Checklist` document associated to this API version.
+
+    As a specific rule, error `501 - NOT_IMPLEMENTED` can be only a possible error response if it is explicitly documented in the API.
+
   license:
     name: Apache 2.0
     url: https://www.apache.org/licenses/LICENSE-2.0.html