The powers of the authority shall be vested in the members thereof in office from time to time and a majority of the total authorized membership of the authority shall constitute a quorum at any meeting thereof. Action may be taken and motions and resolutions adopted by the authority at any meeting thereof by the affirmative vote of a majority of the members present, unless in any case the bylaws of the authority shall require a larger number. No vacancy in the membership of the authority shall impair the right of a quorum to exercise all the rights and perform all the duties of the authority.