Amending Title 19 of The Philadelphia Code, entitled "Finance, Taxes and Collections," by creating a Rainy Day Fund to cushion the impact of unanticipated declines in City revenues; providing for the circumstances under which City monies must be deposited into the Rainy Day Fund and the circumstances under which expenditures may be made from the Rainy Day Fund; and providing for the custody and management of the Rainy Day Fund; all under certain terms and conditions. — Open Common Ground