Notwithstanding the limitations set forth above, limiting each lot to one principal use, on lots of 10 acres or larger, an additional principal use shall be permitted for each 10 acres held as a single lot (e.g., a lot of 35 acres may have three total principal uses, a lot of 45 acres may have four total principal uses, etc.), provided that each principal use shall be sited on the lot so that a new lot can be created for each such principal use in accordance with the statutes, ordinances and regulations of the Commonwealth of Pennsylvania and the Township of Willistown in effect at the time of the creation of the additional principal use.