Cal. Food & Agric. Code § 47022.4

It is unlawful for any person when operating under the provisions of this chapter or the regulations adopted thereunder to remove or dispose any products, or their containers to which any warning tag or notice has been affixed by an enforcing officer, or to remove the warning tag or notice from the place where it is affixed, except under a written permit to do so from an enforcing officer or under his or her specific direction.