California Code of Regulations
Title 13 - Motor Vehicles
Division 2 - Department of the California Highway Patrol
Chapter 4 - Special Equipment
Article 12 - Brake Equipment
Section 1064 - Wheel-Controlled Air Pressure Reducing System

Brake systems that automatically reduce air pressure at the brake actuator to maintain wheel rotation during brake application shall allow at least 90 percent of the air supply pressure at the foot valve to be applied to the brake actuator upon full brake application when the wheel rotates at a rate corresponding to the speed of the vehicle.

1. Editorial correction adding NOTE filed 4-28-83 (Register 83, No. 18).
2. Amendment filed 8-31-83; effective thirtieth day thereafter (Register 83, No. 36).

Note: Authority cited and Reference: Section 26502, Vehicle Code.