VMS Help SET, PROTECTION, /DEFAULT, Example  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  $ SET PROTECTION=(GROUP:RWED,WORLD:R)/DEFAULT

      The SET PROTECTION/DEFAULT command in this example sets the
      default protection to grant unlimited access to other users in
      the same group and read (R) access to all users. The default
      protections for system and owner are not changed.