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6. Exchange of notes regarding application of commercial agreements to Liechtenstein.* Signed at London 28 March and 26 April 1924. By this exchange of notes it was agreed that the commercial agreements in force between the United Kingdom and Switzerland should apply also to the Principality of Liechtenstein so long as the latter remained an integral part of Swiss customs territory, in virtue of the treaty between Switzerland and Liechtenstein of 29 March 1923. U.K.T.S. No. 20 (1924); S.P. CXIX, 465. 7. Extradition convention (supplementary to treaty of 26 November 1880). Signed at Berne 19 December 1934; ratifications exchanged 6 June 1935 ; effective 6 September 1935; same duration as treaty of 26 November 1880. New Zealand (including Western Samoa) acceded, with effect from 3 January 1936, by exchange of notes at Berne 24 and 30 October and 18 and 21 December 1935. U.K.T.S. No. 29 (1935); L.N.T.S. CLXIII, 103, 108. 8. Convention respecting legal proceedings in civil and commercial matters. Signed at London 3 December 1937; ratifications exchanged 7 February 1939 ; effective 6 March 1939 ; terminable after six months' notice. New Zealand acceded 26 October 1939. U.K.T.S. No. 16 (1939); L.N.T.S. CXCIV, 223. 9. Exchange of notes regarding com?nercial relations* Signed at Wellington 5 and 20 May 1938 ; effective 5 May 1938 ; terminable after three months' notice. Notes exchanged direct between Consul of Switzerland at Wellington and New Zealand Government. U.K.T.S. No. 53 (1938); L.N.T.S. CLXXXIX, 167. 10. Exchange of notes regarding documents of identity for aircraft personnel* Signed at Berne 17 May 1938; effective 17 May 1938; ratification not required. Applies to Western Samoa. L.N.T.S. CXCII, 318.