Each diverter shall advise the watermaster of all diversion facilities, reservoir controlling works, and significant return flow points to be employed in the use of state water or watercourses. This includes borrowed and rented pumps. The watermaster shall assign an identification number for each diversion facility and the controlling works of each reservoir authorized under a water right within the water division. Also, the watermaster may assign an identification number for any point of discharge or other point at which water is returned to a watercourse or reservoir.