B. The governing body shall by ordinance, resolution or motion at any time after the passage of this chapter, call a public hearing to determine the need to activate such a corporation. Notice of such hearing shall be published at least twenty-one days preceding the day on which the hearing is to be held, in a newspaper having a general circulation in the parish or municipality. At the hearing, a full opportunity to be heard shall be granted to all interested parties. If the governing body determines, after such hearing, that a corporation should be activated to exercise the authority herein provided, then the governing body shall adopt an ordinance or resolution so finding, shall cause notice of such ordinance or resolution to be given to the executive officer and shall immediately designate two of its members to serve as directors of the corporation. The executive officer shall thereupon appoint, with the advice and consent of the governing body and as set forth in R.S. 33:7605, the non-ex-officio directors of the corporation, and shall notify the ex-officio directors of the date on which they are to assume their duties. A certificate setting forth the finding by the governing body and declaring that all directors have assumed their offices shall be signed by the mayor and all of the directors, filed in the office of the secretary of state and there remain of record. Upon the filing of such certificate, the directors and their successors shall constitute "The New Community Development Corporation" of the parish or municipality and shall have all the power and authority set forth in this chapter. In any suit, action, or proceeding involving the validity or enforcement of any contract or act of a corporation, a copy of the certificate, duly certified by the secretary of state, shall be conclusive evidence as to the valid formation and activation of the corporation.