D.C. Mun. Regs. tit. 11-I, § 306
306.1 A use on an alley lot or in a building on an alley lot in the D-1-R zone shall be subject to the use regulations in Subtitle U § 600, and is not eligible to generate or receive credits otherwise enabled by Subtitle I, Chapters 8 and 9.
SOURCE: Final Rulemaking published at 63 DCR 2447, 3041 (March 4, 2016 – Part 2).