PD Planned Development Districts are designed to make special provision for the requirements of a broad range of modern, well-planned forms of development which are appropriate in selected suburban locations. Among other things, PD Districts provide for the establishment of compact retail shopping centers in suitable locations and, on larger tract sizes, for an expanded range of compatible uses, including office buildings, research laboratories, and light industrial uses which, when subject to high design standards, are harmonious with surrounding areas. In PD Planned Development Districts, the following regulations shall apply.