Below are several helpful links related to the U.S. FDA registration requirements and process.
U.S. Food and Drug Administration:
http://www.fda.gov/default.htm
Background on the Food Safety Modernization Act (FSMA) :http://www.fda.gov/Food/GuidanceRegulation/FSMA/ucm239907.htm
Frequently Asked Questions:
http://www.fda.gov/Food/GuidanceRegulation/FSMA/ucm247559.htm