VMS Help DCE_SECURITY, Admin Intro, DCE$IMPORT, IMPORT, Data Qualifiers, /RENEWABLE_LIFETIME=hours  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /RENEWABLE_LIFETIME=hours

    Specifies the amount of time, in hours, before a
    principal's ticket-granting ticket expires and that
    principal must log into the system again to reauthenticate
    and obtain another ticket-granting ticket.

    If not specified the Maximum Certificate Renewable Lifetime
    defined as registry authorization policy is used.