Section 1(b).

No monies paid into the state treasury which are derived from fees, excises or license taxes relating to registration, operation or use of vehicles on the public highways or to fuels used for the propulsion of such vehicles, except fees and charges paid to the board of railroad commissioners of the State of Montana and the public service commission of Montana or its successor or successors by motor carriers pursuant to the law, shall be expended for other than cost of administering laws under which such monies are derived, statutory refunds and adjustments provided therein, payment of highway obligations, cost of construction, reconstruction, maintenance and repair of public highways, roads, streets, and bridges, and expenses authorized by the state legislature for dissemination of public information relating to the public highways, roads, streets and bridges of the State of Montana and the use thereof.