(a) Any seller who has taken or received an open end consumer credit contract before November 1, 1977, shall be exempt from the requirements of 16 CFR part 433 with respect to such contract provided the contract does not cut off consumers' claims and defenses.

(b) Definitions. The following definitions apply to this exemption:

(1) All pertinent definitions contained in 16 CFR 433.1.

(2) Open end consumer credit contract: a consumer credit contract pursuant to which “open end credit” is extended.

(3) “Open end credit”: consumer credit extended on an account pursuant to a plan under which a creditor may permit an applicant to make purchases or make loans, from time to time, directly from the creditor or indirectly by use of a credit card, check, or other device, as the plan may provide. The term does not include negotiated advances under an open-end real estate mortgage or a letter of credit.

(4) Contract which does not cut off consumers' claims and defenses: A consumer credit contract which does not constitute or contain a negotiable instrument, or contain any waiver, limitation, term, or condition which has the effect of limiting a consumer's right to assert against any holder of the contract all legally sufficient claims and defenses which the consumer could assert against the seller of goods or services purchased pursuant to the contract.