When the federal government has acted, any state legislation which interferes with the accomplishment of the Congressional purpose or the operation of the regulatory scheme is unconstitutional under the supremacy clause.

• 当联邦政府发挥作用时，任何干扰国会目标实现的州立法，或者任何干扰管制方案实施的州立法，按最高条款规定，都是违犯宪法的。