Parent tract. When used in determining the permissible number of lots which may be subdivided in the Agricultural Zone, all contiguous land located in Leacock Township and held in single and separate ownership, regardless of whether such land is divided into one or more lots, parcels, purparts or tracts; such land was acquired by the landowner at different times or by different deeds, devise, partition or otherwise; or such land is bisected by public or private streets or rights-of-way, which was held by the landowner or his predecessor in title on August 5, 2003, or, if such land was not classified as Agricultural Zone on August 5, 2003, which was held by the landowner or his predecessor in title on the date such land was first classified as Agricultural Zone after August 5, 2003. Any limitation on the number of lots allowed to be subdivided under prior provisions of this chapter is hereby superseded, and the number of permissible subdivisions shall be based on the parent tract as defined on the August 5, 2003, adoption of this chapter. In addition, any subdivision plan notes that limit future subdivision based on prior provisions of the Zoning Ordinance are also null and void.