Milnot Company v. Richardson
Facts
Milnot is a food product made by skimming cream from whole milk, adding soybean oil and vitamins A and D to the remaining fat-free milk, and evaporating part of the water; the record showed it was wholesome, nutritious, and useful as food. The Filled Milk Act prohibits interstate shipment of "filled milk," and Milnot had previously been treated as such, causing plaintiff to limit distribution to intrastate commerce. Since the Supreme Court's earlier Carolene decisions, new imitation milk and dairy products have entered interstate commerce and compete with Milnot. Some of those products are made in part from skim milk and vegetable oil and are similar to Milnot in composition, appearance, and use, yet are permitted to move in interstate commerce.
Issue
Whether Milnot is a "filled milk" within the statute, whether prior litigation barred renewed constitutional review, and, if not barred, whether applying the Filled Milk Act to prohibit interstate shipment of Milnot violates due process because current market conditions make the distinction irrational.
Rule
Economic regulatory legislation satisfies due process if, in light of known facts, it can rationally be assumed to rest on some rational basis within legislative knowledge and experience. But when a statute's validity depends on a particular state of facts, its constitutionality may be challenged by showing that those facts have ceased to exist; and res judicata does not bar such a challenge when later-arising facts furnish a new basis for relief.
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If Prairie Harvest seeks a declaratory judgment that its product is outside the statute because it is nutritious and vitamin-fortified, what is the strongest prediction?