The treaty establishing the Benelux Economic Union ( Benelux Economische Unie\/Union Ã conomique Benelux ) was signed February 3 , 1958 and came into force in 1960 to promote the free movement of workers , capital , services , and goods in the region . The treaty establishing the Benelux Economic Union ( Benelux Economische Unie\/Union Ã conomique Benelux ) was signed on February 3 , 1958 and came into force on November 1 , 1960 to promote the free movement of workers , capital , services , and goods in the region .