D.C. Mun. Regs. tit. 3, § 909
909.1 Within a reasonable period of time after receiving notice from the D.C. Board of Elections of a vacancy in a non-party affiliated at-large seat, the Council of the District of Columbia shall appoint a qualified elector who is not affiliated with any political party.
909.2 The elector appointed Councilmember at-large shall fill the office until the D.C. Board of Elections holds a special election and certifies the winner, as provided by D.C. Official Code § 1-204.01(d)(2) (2012 Repl.).
909.3 The elector appointed to the Council pursuant to the Charter and this chapter shall, within thirty (30) days of the appointment, comply with the requirements of D.C. Official Code § 1-1106.02(a) and (b) (2012 Repl.).
SOURCE: Final Rulemaking published at 28 DCR 1726 (April 17, 1981), incorporating the text of Proposed Rulemaking published at 28 DCR 403 (January 23, 1981); as amended by Final Rulemaking published at 58 DCR 8058 (September 16, 2011); as amended by Final Rulemaking published at 62 DCR 14744 (November 13, 2015).