(a) The municipalities and counties or any one or more of them participating therein, jointly or severally, may appoint members of the said authorities and to contribute to the cost of acquiring, establishing, constructing, equipping, improving, and maintaining and operating the said airports and appurtenant facilities.
(b) Any of the municipalities or counties as provided in section one of this article may convey or transfer to the authorities property of any kind heretofore acquired by the municipalities or counties for airport purposes.