UAFALTERNATE

   UAFALTERNATE enables or disables the assignment of SYSUAF
   as the logical name for SYSUAFALT, causing all references
   to the user authorization file (SYSUAF) to be translated to
   SYS$SYSTEM:SYSUAFALT. Use of the normal user authorization file
   (SYS$SYSTEM:SYSUAF) can be restored by deassigning the system
   logical name SYSUAF. This parameter should be set on (1) only
   when the system is being used by a restricted set of users. You
   must create a user authorization file named SYSUAFALT prior to
   setting UAFALTERNATE to 1.

   UAFALTERNATE has the GEN and MAJOR attributes.