The attorney general is authorized to take such action as the attorney general deems necessary in order to contest or oppose existing statutes, ordinances, rules, orders or other trade barriers which may restrict the sale in other states of milk or other dairy products produced in Minnesota; to study and investigate problems concerning the free movement of milk and other dairy products in interstate commerce and to present the results thereof to such legislative and executive agencies of the federal government and the several states, such studies, investigations and presentations to executive and legislative agencies to be made either individually or jointly with others.