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

       /GROUP_UIC=group_uic

    Specifies the group part of the UIC for the OpenVMS
    account. GROUP_UIC can be specified as an octal
    group UIC code or as an existing group UIC identifier.
    If specified as an octal number, it must be in the
    range 1 to 37776 (octal).

    The default is to take the OpenVMS account's ACCOUNT
    field, convert it to uppercase, and interpret this as a group
    UIC identifier. If such an identifier does not exist then
    a similar translation is attempted for the DCE account's
    group name. If neither identifiers exist, the group
    UIC is derived from the OpenVMS account specified by the
    /LIKE qualifier.