service/overview.md

@@ -51,4 +51,10 @@ This feature can be used for a filesystem, that is used by more than one service
 
 ## Access Rule
 
+Access rules determine, if a user may register or use a service. This rule is checked on registration, user login to reg-app and on a service access, if the REST API is called.
+
+* [Entitlement check example](../rules/example_entitlement)
+* [Mandatory LDAP Values rule](../rules/example_mandytory_ldap_values)
+
+
 ## Group Filter Rule