(1) The State Department of Agriculture shall enforce the provisions of ORS 632.516 (Establishment of grades and standards) to 632.625 (Violation of walnut and filbert law prohibited), and may make rules and regulations necessary or convenient for such enforcement. It may employ such inspectors, agents and representatives as it finds necessary and enter into agreements with the United States Department of Agriculture, its authorized agents, officers and representatives as it deems necessary to carry out such sections, not contrary to the laws of this state.
(2) Upon complaint, properly filed, that unshelled walnuts or unshelled filberts are offered for sale or shipment in violation of ORS 632.516 (Establishment of grades and standards) to 632.625 (Violation of walnut and filbert law prohibited), the State Department of Agriculture shall make the necessary investigation. If the complaint is found true, the department shall report the facts to the district attorney of the county in which the violation occurred and the district attorney shall prosecute such offender.
(3) Certificates of inspection of unshelled walnuts and unshelled filberts issued by the department shall be prima facie evidence of the facts contained therein.