The boundaries of said districts shall be as shown upon the map attached to this chapter, marked "Zoning Map." Said map and all the notations, references and other data shown thereon are incorporated by reference and shall be as much a part of this chapter if all were fully described herein.[1]

The Delaware County Stormwater Management Plan, Ridley Creek Watershed, Subarea Map, including Plat 1 and Table I-2, as prepared by the Delaware County Planning Department, dated November 1982, revised November 1987, is hereby approved and adopted by reference, and the same shall be deemed an overlay on any zoning district now or hereafter applicable to any tract of land in the Township of Nether Providence. Said Stormwater Management Plan overlay shall be applicable to any tract of land in addition to and in conjunction with the Floodplain Conservation District overlay adopted by Ordinance No. 487, enacted November 9, 1978.[2]

The boundaries between districts are, unless otherwise indicated, either the center lines of highways or railroad rights-of-way or such lines extended or lines parallel thereto. Where figures are shown on the Zoning Map between a street and a district boundary line, they indicate that the district boundary line runs parallel to the street at a distance therefrom equivalent to the number of feet so indicated.

When a district boundary line divides a lot held in a single and separate ownership at the time of the adoption of this chapter, the regulations as to the use in the less restricted district shall extend over the portion of the lot in the more restricted district for a distance of not more than 50 feet beyond the district boundary line, provided that, in the case of a lot other than a corner lot, the regulations as to the use in a less-restricted district may extend a distance of more than 50 feet beyond the district boundary line when authorized as a special exception.