It is not the intent of the Legislature in enacting this article to preempt the field of pollution by vessels, and the provisions of this article do not prohibit the enactment or enforcement of any ordinance by any city, county, or district having the power to regulate pollution by vessels, that is stricter than the provisions of this article.
Source:
Section 117520, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=HSC§ionNum=117520..