RACF® gives control to IRREVX01 both before and after a command is executed. The exit is given control regardless of the command's source (for example, TSO session, operator console, RACF parameter library, application program, or exit).

For commands that specify the AT or ONLYAT keyword, RACF invokes the exit on each target system on which the command executes and the exit exists.

If automatic direction is active, RACF invokes the exit before and after the command executes on the local system. RACF then sends the command to the remote systems. If an IRREVX01 exit exists on a remote system, RACF invokes that exit before and after the command executes on the remote system.