Excepted through lots
R1 R2 R3 R4 R5 R6 R7 R8 R9 R10
(a) In all districts, as indicated, no rear yard regulations shall apply to any through lots that extend less than 110 feet in maximum depth from street to street.
R5D R6A R6B R7A R7B R7D R7X R8A R8B R8X R9A R9D R9X R10A R10X
(b) In the districts indicated, for all buildings and for Quality Housing buildings in other R6, R7, R8, R9 and R10 Districts, no rear yard regulations shall apply to any zoning lot that includes a through lot portion which is contiguous on one side to two corner lot portions, and such zoning lot occupies the entire block frontage of a street.