Sec. 13. Authority of county to appropriate funds.
   The governing body of said county is hereby authorized to appropriate and use from the net proceeds derived from the operation by said county, of any public utility, or from funds derived from any source other than ad valorem taxes, sums sufficient to carry out the provisions of this act as to the establishing and maintenance of any airport in such proportion and upon such basis as may be determined by said county.
(Sess. Laws 1971, ch. 503, § 13.)