The provisions of section 3 shall not apply to retail mercantile establishments or departments that have a policy of providing, for a period of not less than 20 days after the date of purchase, a cash refund for a cash purchase or providing a cash refund or issuing a credit for a credit purchase, which credit is applied to the account on which the purchase was debited, in connection with the return of its unused and undamaged merchandise.

L.1982, c. 29, s. 6.