For signatories: by ratifications deposited in Washington “as soon as all their several instruments of ratification shall have been deposited.”

For other powers: by adherence, effective immediately upon deposit (Art. III).

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U.S. Department of State

Welcome to the new

Our new design makes it easier to find and learn about the State Department’s programs and services—from passports and visas to learning how U.S. diplomacy benefits the American people.