The first clause, section one, says the law was to go into effect one year from its ratification. It was passed by Congress on December 18, 1917. The thirty-sixth state (required number for passage) to ratify the amendment did so 394 days later on January 16, 1919. The forty-seventh state to ratify the amendment was New Jersey on March 9, 1922. Rhode Island was the only state to reject ratification of the 18th Amendment.