The principle that requires states to recognize legal documents and decisions from other states is known as what?

The principle that requires states to recognize legal documents and decisions from other states is known as the Full Faith and Credit Clause. This clause is found in Article IV, Section 1 of the U.S. Constitution. It mandates that each state must respect the public acts, records, and judicial proceedings of every other state. This means that if a legal decision is made in one state, it must be recognized and upheld in another state, ensuring consistency and stability across state lines.

For instance, if a couple is legally married in one state, that marriage must be recognized in all other states, even if the laws regarding marriage differ from state to state. This principle facilitates cooperation and unity among the states and is fundamental to the functioning of the federal system.

The other options pertain to different legal concepts. The Equal Protection Clause relates to ensuring that individuals are treated equally under the law. The Commerce Clause grants Congress the authority to regulate interstate commerce, while the Dormant Commerce Clause is a legal doctrine that restricts states from enacting legislation that discriminates against or excessively burdens interstate commerce. These concepts do not relate to the recognition of legal documents between states.