Section 26707 Of Chapter 4. Windshields And Mirrors From California Vehicle Code >> Division 12. >> Chapter 4.

. Windshield wipers required by this code shall be maintained in good operating condition and shall provide clear vision through the windshield for the driver. Wipers shall be operated under conditions of fog, snow, or rain and shall be capable of effectively clearing the windshield under all ordinary storm or load conditions while the vehicle is in operation.