The new CARIFTA agreement came into effect on May 1, 1968, with the participation of Antigua, Barbados, Trinidad and Tobago and Guyana. The original idea to permit all territories in the region to participate in the Association was achieved a few months later with the entry of Dominica, Grenada, St. Kitts/Nevis/Anguilla, Saint Lucia and St. Vincent in July and of Jamaica and Montserrat on August 1, 1968. British Honduras (Belize) became a member in May 1971 following its government's agreement to become a member of the Association (and had promised to take the necessary steps to become so) in February 1969 at a Commonwealth Caribbean Heads of Government Conference in Port-of-Spain, Trinidad and Tobago.