If any stockholder not voting in favor of said merger or consolidation agreement records his opposition to such merger or consolidation at the time of the meeting, or within twenty days thereafter, and demands payment of his shares, and if such merger or consolidation is carried out, in such case said stockholder may, within sixty days after the merger or consolidation, upon written ten-day notice on said corporation, petition the District Court to appoint three appraisers to estimate and determine the value of his shares, and the court shall make such appointment. It shall also designate the date and place where the appraisers shall first meet, and shall give them such instructions as to such procedure to be followed as the court may deem pertinent. The court shall also specify the date and manner in which the value of said shares shall be paid to the aforesaid stockholder. The appraisers shall meet on the date and at the place designated, and after taking oath, shall proceed to perform the duties imposed on them by the court and to estimate and determine the value of the aforesaid shares. They shall deliver a copy of their report to the court and to the corporation, and to the stockholder, if he demands it. All expenses incurred in determining the value of said shares shall be for account of the corporation. When the corporation has paid the value of the aforesaid shares, as the same may have been fixed by the appraisers, said shares shall be canceled and the stockholder shall cease to be a stockholder of the corporation or to have any interest therein, and the corporation may dispose of such shares of stock for its own benefit. In case of emergency, when necessary for a better protection of the interests of the depositors and of the bank, if the merger or consolidation is approved by the votes of the stockholders of three-fourths of the shares, such merger or consolidation agreement having been submitted to the consideration of the Banking Board and thereby approved, the stockholders who may not have agreed to said merger shall in all respects be subject to, and be bound by, such merger or consolidation. The Banking Board shall, in these cases, certify that the merger was made on account of an emergency, and that, in its opinion, the same will be beneficial to the public interest. Should the Banking Board disapprove the merger or consolidation agreement made by reason of emergency, it shall, within the term of ninety days, serve notice of its determination by registered mail on the banks interested in the agreement. The finding of the Banking Board disapproving a merger or consolidation agreement made for reasons of emergency shall be conclusive.