/sys$common/syshlp/helplib.hlb Sys Parameters, MAXQUEPRI  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    MAXQUEPRI determines the highest scheduling priority that can be
    assigned to jobs entered in batch and output (printer, server,
    and terminal) queues without the submitter process having OPER or
    ALTPRI privilege. The value of this parameter can range from 0 to
    255; the default is 100. The value of MAXQUEPRI should be greater
    than or equal to DEFQUEPRI.

                                   NOTE

       MAXQUEPRI refers to relative queue scheduling priority, not
       to the execution priority of the job.

    MAXQUEPRI is a DYNAMIC parameter.