A controller 103 for a dispatch communications system 100 that is arranged and constructed for limiting a transmission in the dispatch communications system, methods thereof, and communications units 115, 117, 123 for use within the system have been discussed. The controller comprises: a processor 405, cooperatively operating with a transceiver 403, to; grant and provide a first right to talk to a first user 203; monitor a dispatch call resulting from the grant of the first right to talk to the first user to evaluate whether the first user should retain the first right to talk 207, 209; and notify, when the evaluation so determines, a second user 211 that the first right to talk is no longer applicable.