Library /sys$common/syshlp/sysmanhelp.hlb DISKQUOTA, REMOVE, Description  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    The DISKQUOTA REMOVE command eliminates the specified UIC from
    the quota file on the named device.

    If the usage count for the UIC is not zero, files remain on
    disk and the user can still log in, but any attempt to create
    or extend files will fail.

    The UIC [0,0] entry cannot be removed.