Claim: London Customs Convention, officially titled the Netherlands–Belgium–Luxembourg Customs Convention, is a treaty that was signed on September 5, 1944 at London which was ratified in The Hague in 1947, but it was eventually revoked after a year due to a stronger treaty.
Evidence: Ratified in The Hague in 1947, the London Customs Convention came into force in 1948 and lasted until 1960 when it was superseded by the stronger Benelux Economic Union, signed in The Hague in 1958.