+
+### Default Truststore Certificates
+
+The default truststore includes the following trusted certificates:
+- **A1 Simulator Certificate**: [a1simulator cert](https://gerrit.o-ran-sc.org/r/gitweb?p=sim/a1-interface.git;a=tree;f=near-rt-ric-simulator/certificate;h=172c1e5aacd52d760e4416288dc5648a5817ce65;hb=HEAD)
+- **A1 Controller Certificate**: [a1controller cert (keystore.jks)](https://gerrit.o-ran-sc.org/r/gitweb?p=nonrtric.git;a=tree;f=sdnc-a1-controller/oam/installation/sdnc-a1/src/main/resources;h=17fdf6cecc7a866c5ce10a35672b742a9f0c4acf;hb=HEAD)
+- **Policy Agent's Own Certificate**: Used for mocking and unit-testing purposes (ApplicationTest.java).
+
+### Overriding Default Configuration
+
+You can override the default keystore, truststore, and application.yaml files by mounting new files using the `volumes` field in Docker Compose or the `docker run` command.
+
+Assuming the new keystore, truststore, and application.yaml files are located in the same directory as your Docker Compose file, the `volumes` field should include these entries:
+
+```yaml