; (D) by inserting after paragraph (3) the following: (4) If the Board finds that, in an election under paragraph (1), a majority of the valid votes cast in a unit appropriate for purposes of collective bargaining have been cast in favor of representation by the labor organization, the Board shall certify the labor organization as the representative of the employees in such unit and shall issue an order requiring the employer of such employees to collectively bargain with the labor organization in accordance with section 8(d). This order shall be deemed an order under section 10(c) of this Act, without need for a determination of an unfair labor practice. (5) (A) If the Board finds that, in an election under paragraph (1), a majority of the valid votes cast in a unit appropriate for purposes of collective bargaining have not been cast in favor of representation by the labor organization, the Board shall certify the results of the election, subject to subparagraphs (B) and (C). (B) In any case in which a majority of the valid votes cast in a unit appropriate for purposes of collective bargaining have not been cast in favor of representation by the labor organization and the Board determines, following a post-election hearing, that the employer has committed a violation of this Act or otherwise interfered with a fair election, and the employer has not demonstrated that the violation or other interference is unlikely to have affected the outcome of the election, the Board shall, without ordering a new election, set aside the election and certify the labor organization as the representative of the employees in such unit and issue an order requiring the employer to bargain with the labor organization in accordance with section 8(d) if, at any time during the period beginning 1 year preceding the date of the commencement 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