15 USC § 1666g
Tie-in services prohibited for issuance of credit card
through Pub. L. 116-344, except Pub. Ls. 116-260 and 116-283
Notwithstanding any agreement to the contrary, a card issuer may not require a seller, as a condition to participating in a credit card plan, to open an account with or procure any other service from the card issuer or its subsidiary or agent.