A city natural gas distribution operation shall report to the Pennsylvania Intergovernmental Cooperation Authority established pursuant to the act of June 5, 1991 (P.L.9, No.6), known as the Pennsylvania Intergovernmental Cooperation Authority Act for Cities of the First Class, an assisted city or corporate entity of an assisted city, as those terms are defined in the Pennsylvania Intergovernmental Cooperation Authority Act, that has not paid in full for charges for service by the due dates stated on the bill or otherwise agreed upon.