Amending Chapter 19-1800 of The Philadelphia Code, entitled "School Tax Authorization," by providing that for tax year 2007 and thereafter, real estate taxes imposed by the Board of Education of the School District of Philadelphia on a property shall not increase by more than a specified percentage as the result of an increase in the assessed value of the property as returned by the Board of Revision of Taxes, and by making certain technical amendments; all under certain terms and conditions. — Open Common Ground