Many of the techniques used in creating a HACCP plan are shared with other types of plans, such as food quality and food defense plans. This article discusses regulatory changes in the dairy industry through the years, including the Grade "A" Pasteurized Milk Ordinance (PMO), the National Conference on Interstate Milk Shippers Dairy HACCP Pilot Program, and the incorporation of the Food Safety Modernization Act Preventive Controls Rule within the PMO.