which constitutional provisions says that a valid federal law....?
Overrides any state law that conflicts with federal law?
- Anonymous10 years agoFavorite Answer
The preemption doctrine derives from the Supremacy Clause of the Constitution which states that the "Constitution and the laws of the United States...shall be the supreme law of the land...anything in the constitutions or laws of any State to the contrary notwithstanding." This means of course, that any federal law--even a regulation of a federal agency--trumps any conflicting state law.
Preemption can be either express or implied. When Congress chooses to expressly preempt state law, the only question for courts becomes determining whether the challenged state law is one that the federal law is intended to preempt. Implied preemption presents more difficult issues. The Court has to look beyond the express language of federal statutes to determine whether Congress has "occupied the field" in which the state is attempting to regulate, or whether a state law directly conflicts with federal law, or whether enforcement of the state law might frustrate federal purposes.
Federal "occupation of the field" occurs, according to the Court in Pennsylvania v Nelson (1956), when there is "no room" left for state regulation. Courts are to look to the pervasiveness of the federal scheme of regulation, the federal interest at stake, and the danger of frustration of federal goals in making the determination as to whether a challenged state law can stand.