a. The Board of Public Utilities shall, in accordance with the provisions of the "Solid Waste Utility Control Act of 1970" (P.L.1970, c. 40; C. 48:13A-1 et seq.), establish an equitable rate schedule based upon weight for the solid waste disposed of at all solid waste facilities required to install scales pursuant to this act.
b. In instances where solid waste to be disposed is of substantially higher or lower density than normal, the solid waste facility shall weigh the waste, but the board, at its discretion, or upon petition, may require the amendment of any tariff to provide for rates based on factors in addition to weight.