The user identification criteria form the first part of an ACL
       entry. The user identification criteria determine the user or
       class of users to whom the entry applies. The dictionary compares
       the user identification criteria with the characteristics of the
       user's process and with any passwords appended to the given name
       of the object or directory.

       An ACL on a directory or object in the DMU format dictionary
       can identify you by your username, your UIC (User Identification
       Code), a password, your terminal number or job class.

       An ACL on a CDO format dictionary or object can identify you by
       your username, your UIC (User Identification Code), or your job
       class.

       In an ACL entry, you can specify one option from each available
       category. You can include one username, one UIC, one password
       (DMU only), and one terminal number (DMU only) or job class. You
       must include at least one user identification criterion per ACL
       entry.