29 CFR 1206.1 - Run-off elections.
(a) In an election among any craft or class where three or more options (including the option for no representation) receive valid votes, if no option receives a majority of the legal votes cast, or in the event of a tie vote, the Board shall authorize a run-off election.
(b) In the event a run-off election is authorized by the Board, the names of the two options which received the highest number of votes cast in the first election shall be placed on the run-off ballot, and no blank line on which voters may write in the name of any organization or individual will be provided on the run-off ballot.
(c) Employees who were eligible to vote at the conclusion of the first election shall be eligible to vote in the run-off election except:
(1) Those employees whose employment relationship has terminated; and
(2) Those employees who are no longer employed in the craft or class.