D.C. Mun. Regs. tit. 14, § 5312
5312.1 Families shall be requested to provide information on income, assets, allowances and deductions, and Family composition at least biennially.
5312.2 Biennial recertification for midmonth move-ins (for example September 15th) shall be conducted no later than the second following year by the first of the move-in month (for example September 1st).
5312.3 When families move to another dwelling unit, the Family will be required to complete an interim recertification.
5312.4 If the Family reports a change which results in an increase or decrease in the TTP, other than in response to a biennial recertification, it shall be considered an interim adjustment.
SOURCE: Final Rulemaking published at 59 DCR 7890, 7895 (June 29, 2012).