53 Pa. Stat. § 10918
A municipal zoning ordinance enacted on or before August 21, 2000, shall not be invalidated, superseded or affected by any amendatory provision of the act of June 22, 2000 (P.L. 483, No. 67), entitled "An act amending the act of July 31, 1968 (P.L. 805, No. 247), entitled, as amended, 'An act to empower cities of the second class A, and third class, boroughs, incorporated towns, townships of the first and second classes including those within a county of the second class and counties of the second through eighth classes, individually or jointly, to plan their development and to govern the same by zoning, subdivision and land development ordinances, planned residential development and other ordinances, by official maps, by the reservation of certain land for future public purpose and by the acquisition of such land; to promote the conservation of energy through the use of planning practices and to promote the effective utilization of renewable energy sources; providing for the establishment of planning commissions, planning departments, planning committees and zoning hearing boards, authorizing them to charge fees, make inspections and hold public hearings; providing for mediation; providing for transferable development rights; providing for appropriations, appeals to courts and penalties for violations; and repealing acts and parts of acts,' adding definitions; providing for intergovernmental cooperative planning and implementation agreements; further providing for repeals; and making an editorial change," or the act of June 22, 2000 (P.L. 495, No. 68), entitled "An act amending the act of July 31, 1968 (P.L. 805, No. 247), entitled, as amended, 'An act to empower cities of the second class A, and third class, boroughs, incorporated towns, townships of the first and second classes including those within a county of the second class and counties of the second through eighth classes, individually or jointly, to plan their development and to govern the same by zoning, subdivision and land development ordinances, planned residential development and other ordinances, by official maps, by the reservation of certain land for future public purpose and by the acquisition of such land; to promote the conservation of energy through the use of planning practices and to promote the effective utilization of renewable energy sources; providing for the establishment of planning commissions, planning departments, planning committees and zoning hearing boards, authorizing them to charge fees, make inspections and hold public hearings; providing for mediation; providing for transferable development rights; providing for appropriations, appeals to courts and penalties for violations; and repealing acts and parts of acts,' further providing for the purpose of the act; adding certain definitions; further providing for various matters relating to the comprehensive plan and for compliance by counties; providing for funding for municipal planning and for neighboring municipalities; further providing for certain ordinances; adding provisions relating to projects of regional impact; providing for traditional neighborhood development; further providing for grant of power, for contents of subdivision and land development ordinance, for approval of plats and for recording of plats and deeds; and providing for municipal authorities and water companies and for transferable development rights," and such ordinance provisions shall continue in full force and effect until February 21, 2001; or, provided, however, any such ordinance shall be subject to such amendatory provisions on and after February 22, 2001.
53 P.S. § 10918