A planned office park is a lot or tract of land, consisting of not less than 10 acres held in single and separate ownership, which has been platted to provide for three or more permitted uses with special emphasis given to aesthetics and compatibility of uses within the tract. A planned office park shall be developed by a single person or body according to an overall plan, subject to review and approval by the Board of Supervisors following Planning Commission review pursuant to the provisions of the West Goshen Township Subdivision and Land Development Ordinance of 1976, as the same may from time to time be amended. Where the developer elects to develop an entire tract under this article, the area of an individual lot (except for a nursing or convalescent home) may be reduced to one acre, provided that the average of the area of the individual lots for the entire tract, excluding the area for convalescent or nursing homes, but including any lots remaining in open space, shall be not less than two acres. It is the specific intent of this article to provide for selected, attractive, modern office and compatible use development in areas where traditional business or industrial development would be inappropriate.