Each political subdivision that provides for solid waste management shall account for all revenue collected from waste management fees, together with interest earned on revenue from the fees, separately from other revenue collected by the political subdivision and shall report revenue collected from the fees and use of the revenue separately from other revenue and use of revenue in any required financial report or audit. For the purposes of this section, "waste management fees" means:
(1) all fees, charges, and surcharges collected under sections 115A.919 , 115A.921 , and 115A.923 ;
(2) all tipping fees collected at waste management facilities owned or operated by the political subdivision;
(3) all charges imposed by the political subdivision for waste collection and management services; and
(4) any other fees, charges, or surcharges imposed on waste or for the purpose of waste management, whether collected directly from generators or indirectly through property taxes or as part of utility or other charges for services provided by the political subdivision.