Library /sys$common/syshlp/sysmanhelp.hlb STARTUP, MODIFY, Qualifiers, /PHASE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /PHASE=phase-name

    Selects startup files for modification based on the phase in
    which they run. Valid phases include LPBEGIN, LPMAIN, LPBETA, and
    END. LPMAIN is the default.