A change in or addition to a looseleaf tariff or schedule shall be made by means of a supplement, or by the issuance of revised or additional original pages, but no tariff shall combine these alternatives. Each supplement shall refer to the page or pages or item or items of the tariff, tariff supplement, or schedule which is amended. Each revised page shall refer to the page or pages cancelled by such revised page.
52 Pa. Code § 53.3