There are additional specific requirements for food additives, like preservatives and coloring additives. For specific requirements please consult Title 21, Code of Federal Regulations, Part 101. Food manufacturers are responsible for the accuracy of all labels and compliance with applicable labeling requirements and regulations. Private food technologists and label consultants are available and should be consulted if technical assistance is required. Dairy products have open dating requirements enforced by the U.S. Department of Food and Agriculture and the California Department of Food And Agriculture.
Infant formula is required to bear a date that ensures full nutritional value.
Other foods are not required to have an open date, but many consumers expect a date on packages. They help manufacturers and retailers to trace and rotate inventories properly. If there is a problem with a particular lot or code, it can be more easily removed from sale. In the event of a recall, failure to have a code on a food product forces the firm to remove all of that product from sale to protect the public.