This is the CodeSystem that contains all the codes in EPA AuditEvent Agent Type Client (https://gematik.de/fhir/epa/CodeSystem/epa-auditevent-agent-type-client-cs) and EPA AuditEvent Agent Type Client (https://gematik.de/fhir/epa/CodeSystem/epa-auditevent-agent-type-client-cs). E.g. what you have to deal with if you get resources containing codes in either of them