D.C. Mun. Regs. tit. 11-A, § 402
402.1 In addition to any controls established in this title, all buildings or other structures shall comply with the Act to Regulate the Height of Buildings in the District of Columbia, approved June 1, 1910, as amended (36 Stat. 452; D.C. Official Code §§ 6-601.01 through 6-601.09).
SOURCE: Final Rulemaking published at 63 DCR 2447, 2623 (March 4, 2016 – Part 2).