Compliancy Policy Guide: Guidance for FDA Staff, Registration of Food Facilities Under the Public Health Security and Bioterrorism Preparedness and Response Act of 2002 [open pdf - 32KB]
"The purpose of registration is to provide FDA with sufficient and reliable information about food and feed facilities. When used with the detention, record keeping, and prior notice provisions in sections 303, 306, and 307, respectively, of the Bioterrorism Act, registration will help provide FDA with information on the origin and distribution of food and feed products and thereby, aid in the detection and quick response to actual or potential threats to the U.S. food supply. Registration information also will help FDA notify firms that may be affected by the actual or potential threat. FDA estimates that the total number of food facilities that must register is approximately 420,000, approximately half of which are domestic."
Center for Food Safety and Applied Nutrition: http://www.cfsan.fda.gov/