As used in this subchapter:
(1) “City” means any city of the first class, any city of the second class, or any incorporated town established by the laws of the State of Arkansas;
(2) “County” means any county in the State of Arkansas;
(3) “Port Priority Improvement Program” means a governmental program to award funds to port authorities to encourage the development of port infrastructure, including the engineering and construction; and
(4) “Public Port Authority” or “port authority” means: A port authority created under the Metropolitan Port Authority Act of 1961, § 14-185-101 et seq.;
(5) A municipal port authority created under § 14-186-201 et seq.; and
(6) An authority created under the Regional Intermodal Facilities Act, § 14-143-101 et seq.