As an associated state of the United Kingdom from 1967 to 1979, St. Lucia had full responsibility for internal self-government but left its external affairs and defense responsibilities to the United Kingdom. This interim arrangement ended on February 22, 1979, when St. Lucia achieved full independence. St. Lucia continues to recognize Queen Elizabeth II as titular head of state and is an active member of the Commonwealth of Nations. The island continues to cooperate with its neighbors through the Caribbean community and common market (CARICOM), the East Caribbean Common Market (ECCM), and the Organisation of Eastern Caribbean States (OECS).