Each automobile competing in a long course off road event (and recommended for all others) is required to carry an operational UHF radio, either hard wired or portable, of at least five watt power output. If the radio is equipped with VOX this must be disabled. Any transmissions between Competitors and their crews must be on a channel other than those advised by the organisers for car to car, recovery crew or otherwise designated for use by the organisers. Any car to car communication is to be limited to occasions where cars are seeking to pass the car in front.
