D.C. Mun. Regs. tit. 3 § 806
The tabulation of votes cast on Election Day shall be started immediately after the close of polls, and shall be conducted under the direct supervision of the Executive Director or his or her designee. The tabulation of votes cast before Election Day may begin prior to the close of polls on Election Day, provided that no tabulation results may be released to the public until after the close of polls on Election Day.
Whenever votes are counted by machines, the Executive Director shall utilize personnel qualified to operate the system. Additional personnel may be employed to perform such tasks as may be deemed necessary by the Executive Director.
Only those persons authorized by the Board, including credentialed poll watchers and election observers, shall be admitted to the Counting Center while tabulation is in progress.
All valid ballots shall be counted by mechanical tabulation unless otherwise determined by the Executive Director.
Special Ballots, together with any damaged ballots received from the vote centers, shall be tabulated separately at a time designated by the Executive Director.
The valid votes recorded on damaged ballots shall be reproduced on duplicate ballots with the original and the reproduced ballots marked for identification with corresponding serial numbers. This process may be observed by poll watchers, election observers, and authorized watchers representing the proponents or opponents of ballot measures.
The reproduced duplicate ballots, which have converted the votes on the damaged ballots to a machine readable form, shall be tabulated by machine.
Federal write- in absentee ballots shall be reproduced and tabulated in the same manner as damaged ballots, in accordance with §§ 806.6 - 806.7.
Repealed.
A count of the number of ballots tallied for a precinct, ballots tallied by groups of precincts and city-wide, shall be accumulated.
The total of votes cast for each candidate whose name appears pre-printed on the ballot shall be calculated by precinct and city-wide.
The total number of write-in votes marked by voters shall be reported for each contest.
The total number of votes cast for each write- in nominee shall be calculated only in contests where at least one individual has timely filed an Affirmation of Write-in Candidacy in accordance with Section 602 of this title, and:
Following tabulation of all ballots, a consolidated report shall be produced showing the total votes cast and counted for all offices and ballot questions. Unless otherwise mandated by the Board, the consolidated ballot report shall be made by precinct.
D.C. Mun. Regs. Tit. 3, § 806