In this section, “milk emergency”: Means a general and acute shortage of milk from Grade A dairy farms; and Does not include a simple shortage of milk from Grade A dairy farms that affects only a small number of distributors. In a milk emergency, the Secretary may authorize the sale of a pasteurized milk product that has not been certified as Grade A pasteurized milk. A person who sells a milk product under this subsection shall label the milk product as the Secretary requires.