Two (2) or more counties in which there are located railroad properties and facilities of a railroad, or in which such properties and facilities previously existed, but were abandoned after February 5, 1976, may, by resolution of each, create a public body, corporate and politic, to be known as a regional railroad authority which shall be authorized to exercise its functions upon the issuance by the Secretary of State of a certificate of incorporation. The board of supervisors of each county joining in such regional authority shall, pursuant to the resolution organizing such authority, appoint five (5) residents of the county as commissioners of the authority and, as soon thereafter as practicable, the governing authorities of any municipality in such county, through which such railroads run, shall appoint a commissioner of the authority. If the regional authority consists of an even number of commissioners, an additional commissioner shall be appointed by the Governor from within the geographic boundaries of the regional authority.