Cal. Fish & Game Code § 6301

The department may enter at any time any vehicle, container, warehouse, depot, ship, or growing area where any fish, amphibians, or aquatic plants are held, transported, or stored, for the purpose of making a regulatory inspection to ascertain whether those fish, amphibians, or aquatic plants are infected, diseased, or parasitized, or to determine if aquaculture products are being or have been legally imported, transported, or possessed.