Background. A landowner who desires to challenge on substantive ground the validity of the Zoning Ordinance or Map, or any provision thereof, that prohibits or restricts the use or development of land in which he/she has an interest, may submit a curative amendment to the Borough Council, pursuant to the provisions of Section 609.1 of the Pennsylvania Municipalities Planning Code Act of 1967, P.L. 705, No.246, as amended.