D.C. Mun. Regs. tit. 11-K, § 921
921.1 In the WR-2, WR-3, WR-4, WR-5, WR-7, WR-8, and WR-10 through WR-15 zones, the GAR requirement is four-tenths (0.4), pursuant to Subtitle C, Chapter 6.
SOURCE: Final Rulemaking published at 63 DCR 2447, 3176 (March 4, 2016 – Part 2); as amended by Final Rulemaking published at 67 DCR 11679 (October 9, 2020).