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18. Air transport agreement* Signed at Washington 3 December 1946; effective 3 December 1946 ; terminable after twelve months' notice. E.A. Pub. No. 23. 19. Exchange of notes constituting an agreement relating to copyright* Signed at Washington 24 April 1947; ratification not required; effective 24 April 1947. N.Z.T.S. No. 3 (1947). Uruguay 1. Treaty for the mutual surrender of fugitive criminals.% Signed at Montevideo 26 March 1884 ; ratifications exchanged 13 December 1884 ; terminable after six months' notice. Article IX amended by protocol of 20 March 1891. S.P. LXXV, 18 ; Hertslet XVII, 1076. 2. Protocol amending article IX of the extradition treaty of 1884.% Signed at Montevideo 20 March 1891 ; same duration as treaty of 1884. S.P. LXXXIII, 22 ; Hertslet XIX, 935. 3. Arbitration treaty.% Signed at Montevideo 18 April 1918; ratifications exchanged 11 February 1919 ; effective 11 February 1919 ; terminable after twelve months' notice. U.K.T.S. No. 3 (1919); S.P. CXII, 779 ; Hertslet XXX, 1070. Venezuela 1. Treaty of amity, commerce and navigation.% Signed at Bogota 18 April 1825 ; ratifications exchanged 7 November 1825. Under article IV of the treaty most-favoured-nation treatment is operative on the basis of reciprocity. S.P. XII, 661 ; Handbook 722; Hertslet 111, 56.