(1) In the Isles PRO zone, all buildings and structures shall cover an area of not more than fifty (50) percent of the lot or parcel of land upon which they are placed.

(2) Subgrade parking structures shall not exceed four and one-half (4.5) feet above street curb on any frontage. Subgrade parking structures shall not be considered as part of the lot coverage but shall have additional review by the Planning Commission or its designee to assure the parking structure is screened and buffered from adjacent property and public view.