(1) The Board of Public Roads Classifications and Standards shall develop the specific criteria for each functional classification set forth in sections 39-2103 and 39-2104, which criteria shall be consistent with the general criteria set forth in those sections. No such criteria shall be adopted until after public hearings have been held thereon at such times and places as to assure interested parties throughout the state an opportunity to be heard thereon. Following their adoption, such criteria shall be printed and published and copies thereof shall be deposited with the Secretary of State, the Clerk of the Legislature, the county clerk of each county, and the clerk of each incorporated municipality.
(2) Within six months from July 19, 1980, the Board of Public Roads Classifications and Standards shall adopt and promulgate the specific criteria for scenic-recreation roads and highways pursuant to sections 39-2103, 39-2105, 39-2109, and 39-2113.
(3) Within six months from August 26, 1983, the Board of Public Roads Classifications and Standards shall adopt and promulgate the specific criteria for minimum maintenance roads and highways.