In a complex sentence, the role of the subordinating conjunction and the dependent clause is to establish a time, a place, a reason, a condition, a concession, or a comparison for the main clause. The subordinating conjunction provides the bridge between the main clause and the dependent clause.
The definition of Act of Supremacy in the law of the United States, as defined by the lexicographer Arthur Leff in his legal dictionary is: An English statute of 1558 establishing the supremacy of the Crown in ecclesiastical matters.
The law that applies to situations where state and federal laws disagree is called the supremacy clause, which is part of article VI of the Constitution. The supremacy clause contains what's known as the doctrine of pre-emption, which says that the federal government wins in the case of conflicting legislation. Basically, if a federal and state law contradict, then when you're in the state you can follow the state law, but the feds can decide to stop you. When there is a conflict between a state law and federal law, it is the federal law that prevails.