Providing that no agreement, memorandum of understanding or other commitment for the private administration, management or operation of any school within the School District of Philadelphia which will require the appropriation of City funds, the imposition of taxes by the City of Philadelphia, or the authorization by City Council of the levying of taxes on behalf of the School District of Philadelphia, or its successors or assigns, shall be entered into or be of any force or effect without the approval of the parents of students at that school, and without the approval of the Council of the Ci — Open Common Ground