D.C. Mun. Regs. tit. 24, § 1100
1100.1 This chapter shall apply to any person engaged in redevelopment or substantial rehabilitation, including sidewalk rehabilitation, where more than fifty percent (50%) of the sidewalk area adjoining a project is planned for construction, within the Downtown Streetscape Area.
Source: Final Rulemaking published at 47 DCR 7117 (September 1, 2000).