The regulations contained herein are promulgated pursuant to Public Resources Code (PRC) §§ 43020, 43020.1, 43021, 43030, 43101, 43103 and Health and Safety Code § 4520. No provision in this Division shall be construed as a limitation or restriction upon the CIWMB's right to exercise discretion which is vested in it by law. Nor shall any provision be construed to limit or restrict counties and cities from promulgating enactments which are as strict as or stricter than the regulations contained in this Division. However, no city or county may promulgate enactments which are inconsistent with the provisions of this Division. Any reference in this chapter to an EA shall be deemed to mean the EA created pursuant to PRC §§ 43200 - 43219.