64.12. Any change in costs resulting from a change in the tariff published by the operator or, as the case may be, from a change made by the Commission shall be paid by or credited to(1) a municipality which, under a by-law, provides the collection or removal of residual materials;
(2) failing such a by-law or where the by-law does not cover the collection or removal of certain residual materials, the person who produces the residual materials.