/sys$common/syshlp/helplib.hlb DELETE, /INTRUSION_RECORD, Qualifiers, /NODE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /NODE=(node-name[,...])

    Deletes the node information relating to the specified nodes. If
    the specified nodes are the only nodes in the node information
    list, the intrusion record is also deleted.