Article VI addresses national legal integrity and the transition to the new constitutional framework. First, it explicitly assumes all debts and contracts entered into by the United States under the previous Articles of Confederation, reassuring international creditors of the new government's financial legitimacy.

Second, it establishes the 'Supremacy Clause,' declaring the Constitution, federal laws made in pursuance of it, and all treaties made under U.S. authority to be the 'supreme Law of the Land.' This dictates that federal law trumps conflicting state constitutions or state laws, binding all judges nationwide.

Finally, Article VI requires all federal and state legislators, executive officers, and judges to take a solemn oath to support the Constitution. It concludes with an essential protection for religious liberty, explicitly stating that no religious test shall ever be required as a qualification for any public office or trust under the United States.