RCW 46.37.290: Special lighting equipment on school buses and private carrier buses.

The chief of the Washington state patrol is authorized to adopt standards and specifications applicable to lighting equipment on and special warning devices to be carried by school buses and private carrier buses consistent with the provisions of this chapter, but supplemental thereto. Such standards and specifications shall correlate with and, so far as possible, conform to the specifications then current as approved by the society of automotive engineers.