When any county bonds shall have been issued in pursuance of this chapter, the county commissioners shall levy annually by tax upon the taxable property in the county a sum sufficient to pay the interest of said bonds, and also a sum sufficient to meet the amount annually required to be raised as a sinking fund to meet the principal of the bonds, which sinking fund shall be provided for by resolution of the board of county commissioners before the issuing of any of the said bonds.
Fla. Stat. § 130.10