Cal. Health & Safety Code § 112175

It is unlawful for any person to engage in commercial shellfish cultivation or the harvesting for human consumption of shellfish from naturally occurring populations, except as provided for in Sections 5670, 7850, 8500, and 15101 of the Fish and Game Code and in regulations adopted by the department pursuant to this chapter, with regard to growing areas, relaying and depuration procedures, and aquaculture facilities.