Notwithstanding any other provisions of this chapter, when all deficient bridges of a county which have a sufficiency rating of less than fifty (50) have been replaced or are under contract for replacement or rehabilitation, then monies in the Local System Bridge Replacement and Rehabilitation Fund created under Section 65-37-13, that are allocated to a particular county may be expended for (a) the purpose of paying the principal, interest and debt service on any bonds, notes or obligations issued or incurred by that county before the effective date of this chapter for the purpose of replacing or rehabilitating any bridge or drainage-related structure on any highway, road or street under the jurisdiction of that county, (b) on bridges in the State Aid Road System, or (c) if bridges in the State Aid Road System of that county are in sufficient repair, such monies may be utilized for the repair of roads on the State Aid Road System or local system roads, upon presentation to the State Aid Engineer of a resolution duly adopted and entered on the minutes of the board of supervisors of such county requesting such expenditure and reciting in the resolution such information as may be necessary for the State Aid Engineer to determine that the county is eligible for expenditure of funds under the provisions of this section.