Amending Title 14 of The Philadelphia Code, entitled "Zoning and Planning," by amending Section 14-102 , entitled "Definitions," by amending Section 14-305, entitled "'C-4' Commercial and 'C-5' Commercial Districts," by removing the incentive gross floor area for the installation of observation rooms or decks in these districts; by amending Section 14-312, entitled "Commercial District Rules and Exceptions for All Districts," by requiring the installation of an observation room or deck on certain newly constructed buildings of a certain height; and by making certain technical changes, all unde — Open Common Ground