Ark. Code Ann. § 19-9-710

Notwithstanding any provisions of state law relating to the investment or reinvestment of surplus funds of any governmental unit or any more restrictive provisions of the law under authority of which the bonds are issued, the proceeds of taxable bonds issued to refund or advance refund a prior issue or issues of bonds may be invested in securities or obligations described in the ordinance or resolution providing for the issuance of such refunding bonds.