An area general plan may be prepared and submitted by the subdivider, for approval by the plan commission, prior to the submission of the initial preliminary plat. The plan commission shall determine that either of the following conditions exists to warrant a requirement of preparation and submission of an area general plan:
A. The parcel initially proposed for platting constitutes a portion of a larger tract of land owned, or under option to purchase by the subdivider;
B. The parcel initially proposed for platting constitutes a portion of a larger land area, the development of which will be complicated by unusual problems of drainage, street layout, utility services, land usage, or land ownership pattern.
(Ord. 81-10 § 3.1 (part), 1980).