The uses permitted within the Route 183 Overlay District are those permitted by the underlying zoning district, subject to any standards imposed by such underlying district. Standards for lot area, yards, height, lot dimensions, coverage, special design requirements, and performance standards imposed by the underlying district shall be applicable unless a more restrictive standard is established by the Route 183 Overlay District. In such a case, the more restrictive standard of the Route 183 Overlay District shall apply. The standards of the Route 183 Overlay District shall not supersede the conditional use standards for hospitals set forth in § 184-66.1 of this chapter.