Cal. Code Regs. tit. 13, § 690.5
Driving lamps shall be connected to the upper beam headlamp circuit so the beam changing switch will turn the lamps off when the headlamps are switched to low beam. A separate switch shall be provided to disconnect driving lamps when not in use.
Note: Authority cited: Section 26103, Vehicle Code. Reference: Sections 24012 and 26103, Vehicle Code.