VMS Help ASSIGN, Qualifiers, /EXECUTIVE_MODE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Requires SYSNAM (system logical name) privilege.

    Creates an executive-mode logical name. If you specify executive
    mode, but do not have SYSNAM privilege, a supervisor-mode logical
    name is created. The mode of the logical name must be the same
    as or external to (less privileged than) the mode of the table in
    which you are placing the name.