Division 3 Special requirements for the connections between tractors and towed vehicles for compressed-air braking systems United Kingdom Original text. Later amendments are not shown. 3.1Division 3.1 3.2Division 3.2 3.3Division 3.3 3.4Division 3.4 3.5Division 3.5 ← Division 2.4 Division 3 Division 3.1 →