Library /sys$common/syshlp/uafhelp.hlb ADD, Qualifiers, /PWDLIFETIME  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /PWDLIFETIME=time (default)
       /NOPWDLIFETIME

    Specifies the length of time a password is valid. Specify a
    delta time value in the form [dddd-] [hh:mm:ss.cc]. For example,
    for a lifetime of 120 days, 0 hours, and 0 seconds, specify
    /PWDLIFETIME="120-". For a lifetime of 120 days 12 hours, 30
    minutes and 30 seconds, specify /PWDLIFETIME="120-12:30:30". If
    a period longer than the specified time elapses before the user
    logs in, the system displays a warning message. The password is
    marked as expired.

    To prevent a password from expiring, specify the time as NONE. By
    default, a password expires in 90 days.