D.C. Mun. Regs. tit. 11, § 2603
2603.1 An inclusionary development for which the primary method of construction does not employ steel and concrete frame structure located in an R-2 through an R-5-B District or in a C-1, C-2-A, W-0 or W-1 District shall devote the greater of 10% of the gross floor area being devoted to residential use or 75% of the bonus density being utilized for inclusionary units.
2603.2 An inclusionary development of steel and concrete frame construction located in the zone districts stated in § 2603.1 or any development located in a C-2-B, C-2-C, C-3, CR, R-5-C, R-5-D, SP, USN, W-2 or W-3 Zone District shall devote the greater of eight percent (8%) of the gross floor area being devoted to residential use or fifty percent (50%) of the bonus density utilized for inclusionary units.
2603.3 Inclusionary developments located in R-3 through R-5-E, C-1, C-2-A, W-0 and W-1 Districts shall set aside 50% of inclusionary units for eligible low-income households and 50% of inclusionary units for eligible moderate-income households. The first inclusionary unit and each additional odd number unit shall be set aside for low-income households.
2603.4 Developments located in CR, C-2-B through C-3-C, USN, W-2 through W-3, and SP Zone Districts shall set aside one hundred percent (100%) of inclusionary units for eligible moderate-income households.
2603.5 The Mayor or the District of Columbia Housing Authority shall have the right to purchase up to twenty-five percent (25%) of inclusionary units in a for-sale inclusionary development in accordance with such procedures as are set forth in the Act.
SOURCE: Final Rulemaking published at 53 DCR 7020 (August 25, 2006); as amended by Final Rulemaking published at 55 DCR 2616 (March 14, 2008); as amended by Notice of Final Rulemaking published at 58 DCR 4788, 4815 (June 3, 2011).