(a) Each year, fifty percent (50%) of all federal-aid secondary road funds allocated to this state shall be set aside by the State Highway Commission for use on county secondary road projects on the federal-aid secondary roads that are included in the state aid road system.
(b) County funds are to be matched in accordance with the applicable federal law relative thereto.
(c) No federal-aid secondary funds shall be used to match any revenue-sharing funds appropriated hereunder.
(d) Federal-aid secondary road funds that are not committed for use on county secondary federal-aid road projects during any current two-year period shall revert to, and may be used by, the Arkansas Department of Transportation on state secondary highways.