Providing that no agreement, memorandum of understanding or other commitment for the operation, financing or management of the School District of Philadelphia which will substitute for or supersede the functions of the Board of Education, or its successors or assigns, 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 prior review and appro — Open Common Ground