Constituting the Twelfth Supplemental Ordinance to the General Gas Works Revenue Bond Ordinance of 1998 (the "1998 General Ordinance"); authorizing the City of Philadelphia (the "City") to sell, either at public or private sale, Gas Works Revenue Capital Project Commercial Paper Notes (1998 Ordinance) (the "Notes") to pay the costs of certain capital projects and other Project Costs; authorizing the City to obtain credit enhancement and liquidity for the Notes; making certain determinations and covenants relating to Gas Works Revenues and the payment of interest and principal; and authorizing — Open Common Ground