You might have the student contact a federal agency for this information, or have the student research an administrative law textbook. Ask the student to discuss the legal character of administrative rules. Ask the student to review the U.S. Constitution and its delegation of powers to the federal government. Try relating this set of questions to supply and demand. Ask the student to imagine how an alternative, private system of labeling would work.
Private companies are capable of performing the same service in a cost-effective manner.
This article asks readers to consider the proper scope of government, while also considering the problems associated with government indirectly promoting any particular way of life.