Cal. Code Regs. tit. 13 § 666
The device, when tested in accordance with Section 4.1 of SAE J575g, September 1977, shall show no rotation, displacement, cracking, or rupture of parts which would result in failure of the photometric test or any other test in this article pertaining to the device, nor shall there be any cracking or rupture of parts affecting the mounting of the device. Failure of internal components of any bulb or sealed unit used in the device shall not constitute a failure unless caused by striking parts of the housing. The device shall be mounted on a stand that represents the method and position used for mounting on a vehicle. Instead of the Section 4.1 of SAE J575g, September 1977 test, devices may be tested in accordance with Section 4.1 of SAE J575f, April 1975.
Cal. Code Regs. Tit. 13, § 666
Note: Authority cited: Section 26103, Vehicle Code. Reference: Sections 24012 and 26103, Vehicle Code.