Consistent with the provisions of this act, a seller or holder may increase the rate of the service charge by providing the buyer with a notice of the increase to the extent required and in the manner specified by the Truth in Lending Act, Title I of the Federal Consumer Credit Protection Act ( Public Law 90-321 ) and the regulations issued pursuant thereto by the Board of Governors of the Federal Reserve System (Regulation Z) as such act and regulations may from time to time be amended. Any such increase shall be limited in its application to indebtedness incurred after the effective date of this act.
69 P.S. § 1912