Within the Preservation Area, the open space requirement of Article II, Chapter 3, and the lot coverage provisions of Section 24-11, are not applicable. The lot coverage provisions of this Section apply in lieu thereof. In C6-2 Districts, for the purposes of determining lot coverage, any part of a building that is listed as a permitted obstruction in open space or in a rear yard shall not be included in lot coverage. For zoning lots, or portions thereof, located within 100 feet of the street line of a wide street, the maximum lot coverage shall not exceed 70 percent. For all zoning lots, or portions thereof, located more than 100 feet from the street line of a wide street, the maximum lot coverage shall not exceed 60 percent.

Any development containing residential uses shall provide a minimum of 20 percent of the lot area of a zoning lot as usable, landscaped open area for occupants of dwelling units in the development.