Library /sys$common/syshlp/acledt.hlb NONE_FLAG  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    OPTION=NONE

    Indicates that no options apply to an entry. Although you
    can create an ACL entry with OPTIONS=None, the option is not
    displayed. When you specify additional options with the None
    option, the other options take precedence. The None option is
    equivalent to omitting the field.