ORS 838.040

A district may establish, construct, expand or lease, control, equip, improve, maintain, operate, police and regulate airports and air navigation facilities, and to this end may exercise all the functions and powers provided in ORS 836.200 to 836.250 and may acquire by lease, purchase, gift, devise, condemnation proceedings or otherwise such real and personal property and rights of way, either within or without the limits of the district as, in the judgment of the board, are necessary or proper.