The board of supervisors of any county receiving a part of the oil severance tax under the provisions of Sections 27-25-501 et seq., is hereby authorized to allocate a part of the money so received to a fund or funds for building and permanent improvements for the county or for any school district or for any road district, and the money so allocated to any such fund or funds may be expended for any purpose as now authorized by law. The authority to allocate a part of the oil severance tax to a fund, or funds, for buildings and other permanent improvements shall be in addition to the authority of the board of supervisors granted by Section 27-25-3.