D.C. Mun. Regs. tit. 7, § 1522
1522.1 Voting shall be in the form of "AYE", "NAY", "NO VOTE/ABSTAIN", or "PRESENT" and shall be recorded by the Executive Director or his/her designee in a manner indicating how each member voted.
1522.2 Votes shall be by voice with the result determined by the Chairman unless a Board member demands a division of the Board.
1522.3 If a Board member demands a division, the Executive Director shall call the roll of the Board members in rotating alphabetical order so that the Board member whose name is called first is the same Board member whose name was called second on the next previous vote, and so on through the roll, so that the Board member whose name is called last is the same Board member whose name was called first on the next previous vote.
1522.4 When a Board member demands a division of the Board, the names of those Board members voting shall be recorded.
SOURCE: Notice of Final Rulemaking published at 49 DCR 10806 (November 29, 2002).