The provisions of Section 31900 are additional to, and not alternative to, other provisions of this division which authorize the commissioner to issue orders or to take other action on account of a violation of any provision of this division or of any regulation or order issued under this division; provided, however, that no person who has been finally convicted under Chapter 12 (commencing with Section 31800) of this division on account of a violation of any provision of Chapter 12 shall be liable to pay a civil penalty under Section 31900 on account of such
violation, nor shall any person who has paid a civil penalty under Section 31900 on account of a violation of any provision of Chapter 12 be liable to criminal prosecution under Chapter 12 on account of such violation.