Upon the request of the Commission and the commodity board, the Attorney General shall institute proceedings to enforce the remedies and to collect the moneys provided for by this chapter. Whenever the Commission and the commodity board have reason to believe that any person has violated the provisions of any marketing agreement or order, the Commission shall be empowered to institute an investigation and, after notice to such person, to conduct a hearing in order to determine the facts for the purpose of referring the matter to the Attorney General for appropriate action.