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

    Modifies the time value specified with the /BEFORE or the /SINCE
    qualifier. The /EXPIRED qualifier selects files according to
    their expiration dates. (The expiration date is set with the
    SET FILE/EXPIRATION_DATE command.) The /EXPIRED qualifier
    is incompatible with the /BACKUP, /CREATED, and /MODIFIED
    qualifiers, which also allow you to select files according
    to time attributes. If you specify none of these four time
    qualifiers, the default is the /CREATED qualifier.