Declares that any provision of a franchise that prohibits a motor fuel retailer from purchasing or selling an alternative motor fuel from a person or firm other than the refiner-supplier, or limits the quantity of motor fuel to be purchased from the other person or firm, or any provision of a franchise which directly or indirectly discourages a motor fuel retailer from purchasing or selling alternative motor fuels from other persons or firms, is null and void as it pertains to that particular alternative motor fuel if the refiner-supplier does not supply or offer to supply to the motor fuel retailer alternative motor fuel. Nothing in this act grants to any motor fuel retailer any rights, authority, or obligation with respect to the permissible uses of the premises or facilities owned, leased, or controlled by a refiner-supplier under the terms of the franchise.