A Water Pollution Control and Abatement Program shall be submitted to the executive director of the commission in accordance with the order issued pursuant to §216.26 of this title (relating to Final Determination of Applicability). Those elements requiring engineering design in the Water Pollution Control and Abatement Program for the city shall be signed and sealed by a professional engineer licensed in the State of Texas who shall certify that the city's Program is designed to abate and prevent water pollution attributable to non-permitted sources located within the city.