It shall be unlawful for any person, firm, or corporation to sell or offer for sale at retail for use or consumption in any motor vehicle or to deliver into any motor vehicle for actual or apparent use therein any motor fuel for use in supplying, creating, or generating motive power to such motor vehicle unless such person, firm, or corporation shall conspicuously and plainly post on the pump from which delivery is made the price or prices of such product.
Ala. Code § 8-17-152 (1975)