You can find the xml files with all details in /ptc/Windchill/load (This is configured in properties and the path could be diferent)
You can read the templates for context of PDM, project, library, ....
By default, ACLs are created but you can add more with the template used to created the object.
We need to created a context (library, project) without any ACL, but we are trying to modify the xml to delete the acl by default and we can not get the result. Someone knows how can we do?