Certified organic requires the rejection of synthetic agrochemicals, irradiation and genetically engineered foods or ingredients. Since 2002, organic certification in the U.S. has taken place under the authroity of the USDA National Organic Program, which accredits organic certifiying agencies, and oversees the regulatory process. To find out more about the national organic certification requirements and organic program, please go to the USDA National Organic Program website www.ams.usda.gov/nop.