For structures allocated in a coupling facility with CFLEVEL=1 or higher, you can use the list authority value to provide conditional processing. For single-entry requests (READ, WRITE, MOVE, DELETE), processing can be made conditional on the success of a comparison between the current a list authority value that you specify in the request itself. You can specify that the comparison is to be either an equal operation or a less-than-or-equal operation. You must explicitly provide the list number as part of the request. If the list authority comparison is successful, the request is processed; if not, the system returns reason code IXLRSNCODEBADLISTAUTH to indicate why the request was not processed. The current list authority value is also returned in the list answer area.

For multiple-entry requests (READ_LIST, READ_MULT, DELETE_MULT, DELETE_ENTRYLIST), the same type of filtering can be used. If the list authority comparison is successful, the request is processed and continues with the next entry to be processed. If the comparison is not successful, the request is not processed and continues with the next entry in the list.