In Area SH, as shown on the District Plan (Map 4 in Appendix A), any development or enlargement comprised of affordable independent residences for seniors shall be permitted upon certification of the Chairperson of the City Planning Commission that:

(a)        such development or enlargement will contain not more than 250 dwelling units of affordable independent residences for seniors, individually or in combination with other developments or enlargements within Area SH that have received prior certification pursuant to this Section;

(b)        a site plan has been submitted showing a detailed plan demonstrating compliance with the provisions of this Chapter; and

(c)        such residences comply with the use and bulk regulations of R3-2 Districts, except that the maximum floor area ratio, maximum lot coverage and minimum required open space shall be as set forth for R3-2 Districts in Section 23-142 (Open space and floor area regulations in R1 and R2 Districts with a letter suffix and R3 through R5 Districts), as modified by this Chapter. The provisions of Section 23-144 (Affordable independent residences for seniors) shall not apply.

Any development or enlargement that results in a total of more than 250 dwelling units of affordable independent residences for seniors in Area SH shall be permitted only upon authorization of the City Planning Commission, pursuant to Section 107-672 (In Area SH).