The commissioner may adopt regulations, in accordance with the provisions of chapter 35 of Title 42, to establish increased efficiency standards for the products listed or incorporated in § 39-27.1-3. In considering the new or amended standards, the commissioner shall set efficiency standards upon a determination that increased efficiency standards would serve to promote energy or water conservation in the state and would be cost effective for consumers who purchase and use these new products; provided that, no new or increased efficiency standards shall become effective within one year following the adoption of any amended regulations establishing such increased efficiency standards.