The construction, acquisition, improvement, extension, equipment, custody, operation and maintenance of any such athletic establishment, and the collection of revenues therefrom, shall be under the supervision and control of the county court, municipal corporation or county board of education, or all or any part of such powers, duties and responsibilities may be placed in a committee appointed by such board by resolution duly adopted. The term "board" when hereafter used in this article shall be construed to mean the county court, municipal corporation or the county board of education or such duly appointed committee, as the case may be.