D.C. Code § 38-313: Rules.

The Mayor shall promulgate rules pursuant to this chapter. The proposed rules shall be submitted to the Council for a 45-day period of review, excluding Saturdays, Sundays, holidays, and days of Council recess. If the Council does not approve or disapprove the proposed rules, in whole or in part, by resolution within the 45-day period, the proposed rules shall be deemed approved.