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.
It means that the federal government, in exercising any of the powers enumerated in the Constitution, must prevail over any conflicting or inconsistent state exercise of power. The concept of federal supremacy was developed by Chief Justice John Marshall, who led the Supreme Court from 1801 to 1835.