California Code, Food and Agricultural Code (Formerly Agricultural Code) - FAC § 42852

A written notice of violation, which is issued by a duly qualified representative of the director or by any commissioner or any qualified representative of the commissioner, which states that a certain lot of produce violates any provision of this division and based upon the examination of such sample, is prima facie evidence of the true condition of the entire lot. The presumption established by this section is a presumption affecting the burden of proof, but it does not apply in a criminal action.