501.0115 Service station credit cards and franchise agreements; certain restrictions on sales and purchasers prohibited.—It shall be unlawful and shall be deemed a deceptive trade practice for any producer or refiner or a subsidiary of any producer or refiner to distribute credit cards, as defined in s. 501.011, intended to be used by credit card holders for the purchase of motor fuel, goods, or services from retail service stations, whether or not owned or operated by the producer or refiner or a subsidiary thereof, unless such credit card is valid for purchases of all motor fuel at each such retail service station. It shall be unlawful for any producer or refiner or a subsidiary thereof to include any restrictions on credit card sales in any franchise agreements with retail service stations which restrictions are not equally applicable to sales of all types of motor fuels sold at such retail service stations. Any person violating the provisions of this section is guilty of a felony of the third degree, punishable as provided in s. 775.082 or s. 775.083. The Department of Legal Affairs or any state attorney is authorized to seek an injunction to prevent the distribution or continued use of credit cards in violation of this section during any litigation contesting the validity thereof. The penalties provided by this section are in addition to any civil remedies otherwise provided by law.