D.C. Mun. Regs. tit. 17, r. 17-8903
A trade name renewal application shall be filed by April 1 of the year in which the trade name registration expires; unless, the trade name registration does not expire on September 1, in which case the renewal application shall be filed within one hundred fifty (150) days before the trade name registration's expiration date.
A trade name renewal application received after the filing deadline shall incur a late fee outlined in Subsection 8908.2.
If a person fails to file its trade name renewal application by the filing deadline and the trade name expires pursuant to § 8902.2, the person shall complete a new trade name application and pay all fees associated with the trade name application if the person wishes to continue to register the trade name.
D.C. Mun. Regs. tit. 17, r. 17-8903