Any joint entity or joint public agency created to fulfill the purposes of the Integrated Solid Waste Management Act pursuant to the Interlocal Cooperation Act or Joint Public Agency Act shall comply with the Municipal Proprietary Function Act for purposes of reporting its budgets. Proprietary budget statements for the joint entity or joint public agency shall be placed on file with the office of the municipal clerk of each member which is a municipality as required by the Municipal Proprietary Function Act and with the county clerk of each member which is a county.