Cal. Code Regs. tit. 13, § 733
Deceleration lamps shall comply with the following mechanical tests in Article 5 of this subchapter:
Corrosion
Dust
Moisture
Vibration
Warpage (at a flashing rate of 1 Hz when a plastic lens or housing is used)
Note: Authority cited: Section 26103, Vehicle Code. Reference: Sections 24012 and 26103, Vehicle Code.