D.C. Mun. Regs. tit. 11-B, § 204
204.1 Any use allowed as a permitted use in a zone shall be allowed as a temporary use within that zone.
204.2 Any use allowed only with conditions in a zone shall be allowed as a temporary use within that zone, subject to all applicable conditions.
204.3 Temporary uses shall:
(a) Have the time period of the allowance established on the certificate of occupancy but shall not exceed one (1) year; and
(b) Not result in the erection of any new permanent structures, although existing permanent structures may be used for a temporary use.
SOURCE: Final Rulemaking published at 63 DCR 2447, 2650 (March 4, 2016 – Part 2).