The board of county commissioners is authorized hereby to make the principal of and
the interest and premium, if any, on the bonds payable both from that portion of the
local government half-cent sales tax received by the county pursuant to F.S. ch. 218,
pt. VI [F.S. § 218.60 et seq.], and from interest received from investments made with
the proceeds of such moneys. Also, the board of county commissioners is authorized
hereby to make the bonds payable from any additional source of revenue legally available
for such purposes, plus any interest earnings thereon.