Ark. Const. amend. 89, § 4

(a) A governmental unit, under laws adopted by the General Assembly, may issue bonds to finance all or a portion of the costs of energy efficiency projects. The bonds may bear such terms, be issued in such manner, and be subject to such conditions as may be authorized by the General Assembly. The bonds authorized by Section 4 shall be governmental bonds subject to the provisions of Section 1 of this amendment. (b) Bonds may be secured by a pledge of the savings from the energy efficiency project and may be repaid from general revenues, special revenues, revenues derived from taxes or any other revenues available to the governmental unit. (c) The authority conferred by this Section 4 shall be supplemental to other constitutional provisions which authorize the issuance of bonds.