28-725. Limitations on overtaking on the left A person shall not drive a vehicle to the left side of the center of the roadway in overtaking and passing another vehicle proceeding in the same direction unless the left side is clearly visible and is free of oncoming traffic for a sufficient distance ahead to permit the overtaking and passing to be completed without interfering with the safe operation of any vehicle approaching from the opposite direction or any vehicle overtaken. The overtaking vehicle shall return to the right-hand side of the roadway before coming within one hundred feet of any vehicle approaching from the opposite direction.
Arizona Legal Code