The purpose of this part is to provide the complete law of this state with respect to payments in lieu of taxes on the property and operations of all gas systems owned and operated by incorporated cities or towns, by counties, and by metropolitan governments, and to repeal the specific provisions of any private act, home rule charter or metropolitan government charter, or any part of any private act, home rule charter or metropolitan government charter, relating to payments in lieu of taxes, except for provisions relating to the distribution of any such payments, but not to repeal any other provisions of such private acts or charters or parts of the private acts or charters. This part is remedial in nature and this part shall be liberally construed to effectuate the purpose of this part.