of the election and ending on the date upon which the Board makes the determination of a violation or other interference, a majority of the employees in the bargaining unit have signed authorizations designating the labor organization as their collective bargaining representative. (C) In any case where the Board determines that an election under this paragraph should be set aside, the Board shall direct a rerun election with appropriate additional safeguards necessary to ensure a fair election process, except in cases where the Board issues a bargaining order under subparagraph (B).