If none of the choices on the ballot receive a majority of the valid votes cast in an election, the Executive Director shall conduct a runoff election between the two choices that received the two largest numbers of votes in the initial election. A runoff election shall be held at least 10 days, and not later than 30 days, after the Board resolves all relevant and properly filed objections or challenges to ballots. Only employees who were eligible to vote in the initial election and who remain in the bargaining unit on the dates of the runoff election are eligible to vote in the runoff election. The order of appearance of the choices on a runoff ballot shall be the same as on the initial ballot. The provisions of COMAR 14.30.10.18—.23 apply to the runoff election.