In 1965, the British West Indies dollar of the now defunct West Indies Federation was replaced at par by the East Caribbean dollar and the BCCB was replaced by the Eastern Caribbean Currency Authority or ECCA (established by the Eastern Caribbean Currency Agreement 1965). British Guiana withdrew from the currency union the following year. Grenada rejoined the common currency arrangement in 1968 having utilized the Trinidad and Tobago dollar from 1964. Barbados withdrew from the currency union in 1972, following which the ECCA headquarters were moved to St. Kitts.