Exchange of notes between the government of the United Kingdom of Great Britain and Northern Ireland and the government of Sierra Leone amending and extending the British Expatriates Supplementation (Sierra Leone) Agreement 1971 : (the British Expatriates Supplementation (Sierra Leone) (Continuance) Agreement 1971/1976), Freetown, 8/26 March 1976 (the exchange of notes entered into force on 31 March 1976) / presented to Parliament by the Secretary of State for Foreign and Commonwealth Affairs by command of Her Majesty, November 1977