In Loechner v. Campoli, 49 N.J. 504, 231 A.2d 553 (1967), the Supreme Court held that the acquisition by a plaintiff of title to undersized, contiguous lots, which were created pursuant to the Old Map Act, will result in a "merger" of those lots necessitating subdivision approval if the effect of a sale of anything less than the entire tract is an undersized lot. 49 N.J. at 508, 231 A.2d 553. The Loechner doctrine is not absolute.