/sys$common/syshlp/helplib.hlb SET, RIGHTS_LIST, Qualifiers, /SYSTEM  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Specifies that the desired operation (addition or removal of
    an identifier) be performed on the system rights list. You
    cannot use the /SYSTEM qualifier with the /PROCESS or the
    /IDENTIFICATION qualifier.