Home2014 Treaties and Agreements ...United Kingdom (14-1217) – Amendment to Agreement of July 3, 1958 for Cooperation on the Uses of Atomic Energy for Mutual Defense Purposes hide United Kingdom (14-1217) – Amendment to Agreement of July 3, 1958 for Cooperation on the Uses of Atomic Energy for Mutual Defense Purposes TIAS Office of Treaty Affairs December 17, 2014 Nuclear Energy: Cooperation for Mutual Defense Purposes Agreement amending the agreement of July 3, 1958, as amended. Signed at Washington July 22, 2014; entered into force December 17, 2014. Download attachment [309 KB] Tags Nuclear Energy Treaties United Kingdom