D.C. Mun. Regs. tit. 11-I, § 553
553
553.1 A building in the D-5-R zone with frontage on a designated primary or secondary street shall meet the design requirements in Subtitle I § 602 unless otherwise governed by Subtitle I § 553.2.
553.2 A building in the D-5-R zone fronting on a designated primary street in the Mount Vernon Triangle Principal Intersection Sub-Area is subject to the design regulations in Subtitle I § 612.
SOURCE: Final Rulemaking published at 63 DCR 2447, 3041 (March 4, 2016 – Part 2).