Defines custom access for a resource - for example that a specific user group has restricted access to a resource.
resource,int(11),
usergroup,int(11),User group ID
user,int(11),
access,int(11),Custom access level. Available options: 0 - Open; 1 - Restricted; 2 - Confidential. See include/definitions.php
user_expires,date,Date custom access expires