Mo. Rev. Stat. § 70.422: Buses, power to purchase and use — lights, color and intensity authorized.

Notwithstanding the provisions of sections 307.080 to 307.105 to the contrary, the bi-state development agency may purchase, own or use buses which have a lighting scheme on the front of such buses containing greater than three lights, having various-colored alternately flashing marker lights, or having more than four auxiliary lights lighted at any one time, even if such lights project a beam of intensity greater than three hundred candlepower.