Notwithstanding any other provisions of this act, upon issuance of the findings and order of the Arkansas Public Service Commission as prescribed in § 23-2-421, no public utility subject to the order shall continue to collect any rates theretofore permitted to be collected under bond. The public utility shall be permitted to collect only those rates set in the order of the commission, and those rates shall be effective throughout any rehearing and judicial review proceedings permitted and prescribed in §§ 23-2-422 — 23-2-424.