The provisions of § 37-5-5 relating to a retailer's right to cancel or discontinue a contract and receive payment for machines, attachments, and parts returned shall apply to all contracts in effect on July 1, 1969, which have no expiration date and are a continuing contract, and all other contracts entered into or renewed after July 1, 1969. Any contract in force and effect on July 1, 1969, which by its own terms will terminate on a date subsequent thereto shall be governed by the law as it existed prior to July 1, 1969.
SDCL 37-5-6