Any use established after the effective date of this chapter shall be so operated as to meet the performance standards established hereinafter. Any use already established and lawfully existing on the date the Unity Township Zoning Ordinance was originally adopted on September 25, 1991, shall be permitted to continue, provided that no alteration, expansion, enlargement or modification shall be permitted which does not meet the performance standards herein or which effectively increases the degree of nonconformity which existed prior to any alteration, expansion, enlargement or modification.

Points of measurement to determine compliance with the performance standards shall be the property line nearest the source which is the subject of measurement unless otherwise specified in this section.

At all street intersections in all districts, no obstructions to vision exceeding 30 inches in height above curb level shall be erected or maintained on any lot within the triangle formed by the street lines of such lot and a line drawn between points along such street lines 30 feet distant from their point of intersection.

At all intersections of driveways and public rights-of-way, no planting, fences or similar materials exceeding 30 inches in height shall be permitted in the first 20 feet from said right-of-way.