A planned business development park (PBD) is flexible development of mixed uses permitted in the BD Business Development Districts, all developed pursuant to an overall integrated plan. The purpose of a PBD is to promote progressive development of land and construction thereon by encouraging planned business developments to achieve office and light industrial development offering greater creativity and flexibility in site plan design than is provided under the strict application of zoning regulations, while at the same time preserving the health, safety, order, convenience, prosperity and general welfare of Cinnaminson Township and its citizens. Any principal building in a PBD may contain more than one use and/or organization, provided that the total building coverage of the combined uses does not exceed the maximum improvement coverage specified for the district. Any lot developed as a PBD may contain more than one principal building, provided that the total improvement coverage specified for the district is not exceeded and the building separation requirements are met. All buildings, signs, walkways and lighting fixtures shall be compatibly designed, whether constructed all at one time or in stages over a period of time. The following provisions shall apply to a PBD in the BD Business Development Districts.