(1) The Arkansas Department of Transportation shall erect appropriate signs along each of the designated music highways, including without limitation a sign at or near each of the art projects that has been issued a certificate of completion under § 13-15-303.
(2) If the Arkansas Department of Transportation does not have the funds available to erect the signs required under subsection (a) of this section, the Arkansas Department of Transportation may accept and use gifts, grants, and donations received from private, public, and nonprofit sources, including without limitation a city street department or a county road department for: Acquiring and installing the signs required under subsection (a) of this section; and
(3) Maintaining, replacing, or reconstructing the signs required under subsection (a) of this section.