Vehicle Code § 26301.5

26301.5.

Every passenger vehicle manufactured and first registered after January 1, 1973, except motorcycles, shall be equipped with an emergency brake system so constructed that rupture or leakage-type failure of any single pressure component of the service brake system, except structural failures of the brake master cylinder body or effectiveness indicator body, shall not result in complete loss of function of the vehicle’s brakes when force on the brake pedal is continued.