相关规则
Union of Soviet Socialist Republics
Practice Relating to Rule 161. International Cooperation in Criminal Proceedings
Upon signature of the 1959 European Convention on Mutual Assistance in Criminal Matters, the USSR declared that it would not consider a grave breach, as defined in the 1949 Geneva Conventions and the 1977 Additional Protocol I, or a violation of Articles 1–4 of the 1977 Additional Protocol II, as a “political offence” or “offences connected with a political offence”. 
USSR, Reservations and declarations made upon signature of the 1959 European Convention on Mutual Assistance in Criminal Matters, 7 November 1996, Article 3.