29 C.F.R. § 102.78
If no agreement such as that provided in § 102.79 has been made, the regional director shall fix the time and place of the election, eligibility requirements for voting, and other arrangements for the balloting. The method of conducting the balloting and the postballoting procedure shall be governed, insofar as applicable, by the provisions of §§ 102.69 and 102.70 except that the labor organization on whose behalf picketing has been conducted may not have its name removed from the ballot without the consent of the regional director and except that the regional director's rulings on any objections or challenged ballots shall be final unless the Board grants special permission to appeal from the regional director's rulings. Any request for such permission shall be filed promptly, in writing, and shall briefly state the grounds relied upon. The party requesting review shall immediately serve a copy thereof on each other party. A request for review shall not operate as a stay of the regional director's rulings unless so ordered by the Board.
29 C.F.R. §102.78