California Code of Regulations
Title 13 - Motor Vehicles
Division 2 - Department of the California Highway Patrol
Chapter 2 - Lighting Equipment
Article 17 - Running Lamps
Section 782 - Mechanical Test Requirements

(a) Housings for Sealed and Semisealed Optical Units. Housings for sealed or semisealed optical units shall comply with the following tests described in Article 5 of this subchapter:

Corrosion

Vibration

Warpage (when plastic housings are used)

(b) Complete Assemblies. Assemblies consisting of a housing with a nonsealed unit or separable bulb, lens, or reflector shall comply with the following tests described in Article 5 of this subchapter:

Corrosion

Dust

Moisture

Vibration

Warpage (when plastic lenses or housings are used)

(c) Sealed or Semisealed Optical Units. Sealed or semisealed optical units shall comply with the following tests described in Article 5 of this subchapter:

Corrosion (when metal reflector backs or replaceable bulbs are used)

Vibration (when filament shields or replaceable bulbs are used)

Warpage (when plastic lenses or reflectors are used)