Section 1 contains the 'Full Faith and Credit Clause,' requiring each state to recognize and respect the public acts, records, and judicial proceedings of every other state. This ensures legal continuity across state borders, meaning a contract, marriage, or court judgment valid in one state is recognized across the entire country.

Section 2 establishes the 'Privileges and Immunities Clause,' guaranteeing that citizens visiting a state enjoy the same constitutional protections and legal rights as that state's residents, preventing discrimination based on home residency. It also outlines extradition requirements, mandating that a fleeing suspect charged with a crime in one state must be returned to the state with jurisdiction over the offense.

Section 3 governs the admission of new states into the Union and the management of federal territories. It grants Congress the power to admit new states but strictly prohibits new states from being formed within the jurisdiction of an existing state, or by merging two or more states, without the explicit consent of the affected state legislatures and Congress.

Section 4 delivers the 'Guarantee Clause,' pledging that the federal government will guarantee to every state in the Union a Republican Form of Government. Additionally, it binds the federal government to protect each state against foreign invasion and, upon request from the state's legislature or executive, against domestic violence or internal rebellion.