First and second editions were published for the country elevator section of the Grain Trade only. The general edition was completely revised in 1939 to serve all sections of the Canadian Grain Trade. The 1939 and 1948 General editions cannot be used with any previous edition of the DRP Grain Code
Pt. 1. Introduction and part I : summary of events to 1930 -- pt. 2. The search for a policy -- pt. 3. From voluntary to compulsory board -- pt. 4. The assurance of markets