D.C. Mun. Regs. tit. 3, § 808
808.1 The provisions of this section shall govern the tabulation of all mail-in ballots timely submitted to the Board.
808.2 The handling and tabulation of mail-in ballots shall:
808.3 All mail-in ballots received by the Board shall be tabulated as soon as practicable after the deadline for the receipt of mail-in ballots received by mail.
808.4 Prior to tabulation, the Executive Director's designee shall verify that the voter signed the mail-in ballot envelope.
808.5 In preparation for tabulation, the Executive Director's designee shall open the outer mailing envelopes and remove the inner secrecy envelope which contains the mail-in ballot.
808.6 Working precinct by precinct, the Executive Director's designee shall:
808.7 The mail-in ballot shall be tabulated and counted as being cast in the ward and precinct in which the voter resides provided that the voter signs the mail-in ballot envelope to certify that they are a registered voter in the District of Columbia, that they have not voted and will not vote more than one ballot in the election, and that they are not voting in any other jurisdiction in the United States.
SOURCE: Final Rulemaking published at 35 DCR 2006, 2016-17 (March 11, 1988); as amended by Final Rulemaking published at 51 DCR 5067 (May 14, 2004); as amended by Final Rulemaking published at 51 DCR 7426 (July 30, 2004); as amended by Emergency and Proposed Rulemaking published at 57 DCR 7705 (August 20, 2010)[EXPIRED]; as amended by Final Rulemaking published at 57 DCR 11149 (November 26, 2010); as amended by Final Rulemaking published at 62 DCR 14744 (November 13, 2015); as amended by Final Rulemaking published at 65 DCR 6543 (June 15, 2018); as amended by Final Rulemaking published at 69 DCR 009504 (July 29, 2022); as amended by Final Rulemaking published at 70 DCR 012730 (September 22, 2023); as amended by Final Rulemaking published at 70 DCR 015793 (December 15, 2023).