Within the Core Subdistrict, as shown on Map 1 in Appendix A of this Chapter, or for that portion of a zoning lot located within the Core Subdistrict, for buildings or portions of buildings developed or enlarged after April 30, 2008, that contain at least 60,000 square feet of floor area and are located on zoning lots with frontage on 125th Street, an amount of space equivalent to a minimum of five percent of the floor area of the development or enlargement shall be occupied by one or more of the uses designated in Section 97-11 (Special Arts and Entertainment Uses).