D.C. Mun. Regs. tit. 14, r. 14-4110
The Mayor, at the request of a housing provider, shall issue a Certificate of Assurance pursuant to § 221 of the Act (D.C. Official Code § 42-3502.21) , for a housing accommodation exempted under § 205(a)(2) or (4) of the Act (D.C. Official Code §§ 42-3502.05(a)(2) or (4)) , for which any building permit has been issued.
A housing provider's request for a Certificate of Assurance shall be in writing and shall be accompanied by the following:
Within twenty (20) days after receipt of a properly filed request for a Certificate of Assurance, the Rent Administrator shall forward to the Mayor a determination of preliminary approval and a recommendation for issuance of a Certificate of Assurance.
The Rent Administrator shall recommend denial where the Rent Administrator finds that the housing accommodation is not eligible for exemption under § 205(a) (2) or (4) of the Act (D.C. Official Code §§ 42-3502.05(a)(2) or (4)) , or that a building permit has not been issued for the subject housing accommodation after May 1, 1985.
D.C. Mun. Regs. tit. 14, r. 14-4110