Insert a new Section R905.1.3 into the Residential Code to read as follows:
Cool Roof Requirements. Roof coverings for roof slopes less than or equal to two units vertical in 12 units horizontal (17 percent slope or less) shall comply with Section R402.6 of the Energy Conservation Code - Residential Provisions
D.C. Mun. Regs. tit. 12, r. 12-B905