Amending Title 17 of The Philadelphia Code, entitled "Contracts and Procurement," by amending Chapter 17-1700, entitled "Prompt Payment of City Vendors and their Subcontractors," by requiring that certain notice be given to the City and subcontractors and sub-subcontractors, providing requirements for City action in certain situations, extending rights and requirements to other contractual parties, and adding certain enforcement options; all under certain terms and conditions. — Open Common Ground