Amending the Ordinance approved June 28, 1966 (Bill No. 1845), as amended, known as the "Philadelphia Housing Development Agreement Ordinance," and entitled "An Ordinance authorizing the Commissioner of Public Property on behalf of the City to enter into an agreement with the Philadelphia Housing Development Corporation to provide for low cost residential development and redevelopment in the City and to cooperate in certain housing programs, including the transfer of certain parcels of land, under certain terms and conditions," by requiring the express approval of Council by ordinance prior to — Open Common Ground