It is hereby further declared to be in the public interest and highly advantageous to the agricultural economy of the state that, producers and handlers of milk and dairy products shall be permitted by referendum to be held among producers in the state and subject to the provisions of this act, to levy upon themselves an assessment on such milk produced in the state, for the purpose of financing or contributing towards the financing of a program of promotion and nutrition education designed to strengthen the dairy industry’s position in the marketplace and to maintain and expand domestic and foreign markets and use for fluid milk and dairy products produced in the state and the United States. It is hereby further declared to be in the public interest and highly advantageous to the agricultural economy of the state that the state ADA conduct the referendum in coordination with the extension service in accordance with the provisions of this act and the Federal Dairy Promotion Program codified in 7 U.S.C. 4501, et seq.