Where the designated Residence District is an R3, R4 or R5 District, the floor area regulations of Section 23-21 (Floor Area Regulations for R1 Through R5 Districts), inclusive, applicable to such Residence District shall apply except that, where located within the Greater Transit Zone, the floor area regulations for R5 Districts on qualifying residential sites shall apply. 

Where the designated Residence District is an R6 through R12 District, the floor area regulations of Section 23-22 (Floor Area Regulations for R6 Through R12 Districts), inclusive, applicable to such Residence District shall apply.