(A)(i) If the unit is not vacant when the exemption terminates or expires, the sum of the rent charged on the date the unit became exempt and each subsequent adjustment of general applicability authorized pursuant to § 42-3502.06(b);
(ii) If the unit is vacant when the exemption terminates or expires:
(I) 110% of the sum authorized under sub-subparagraph (i) of this subparagraph; or
(II) The amount of rent charged for a substantially identical rental unit in the same housing accommodation; provided, that the increase shall not exceed 30% of the sum authorized under sub-subparagraph (i) of this subparagraph; or
(B) If the rent charged on the date the unit became exempt was either not properly filed with the Rent Administrator or is no longer available at the Division, and the housing provider is not able to provide a stamped copy of the original filing demonstrating the rent charged on the date the unit became exempt, the lowest of:
(i) The most recent rent charged on file with the Rent Administrator before the date the unit became exempt, plus each subsequent adjustment of general applicability authorized under § 42-3502.06(b);
(ii) The applicable Small Area Fair Market Rent for the Washington-Arlington-Alexandria Metropolitan area based on unit size and zip code, as established by the U.S. Department of Housing and Urban Development pursuant to 24 CFR § 888.113; or
(iii) The average rent charged during the last 6 consecutive months of the exemption.
(2) For a unit exempted pursuant to § 42-3502.05(a)(3), up to 105% of the average rent charged during the last 6 consecutive months of the exemption.
(a-1) An increase in rent charged pursuant to subsection (a) of this section may be effected only in accordance with the procedures specified in §§ 42-3502.08 and 42-3509.04.
(b) A structure or building, including the land appurtenant, that is located in the District in which one or more rental units as defined in § 42-3501.03(33) are established after July 17, 1985, shall subsequently be defined as a “housing accommodation” for the purposes of this chapter. If any rental unit in such a housing accommodation is not otherwise exempted by one of the provisions of § 42-3502.05, the rent charged for the initial leasing period or the first year of tenancy, whichever is shorter, shall be determined by the housing provider and is considered to be the equivalent of making the computations specified in § 42-3502.06.