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German Democratic Republic
Practice Relating to Rule 158. Prosecution of War Crimes
Section A. General
In 1981, during a debate in the Sixth Committee of the UN General Assembly in relation to the 1954 ILC Draft Code of Offences against the Peace and Security of Mankind, the German Democratic Republic stated:
In connexion with the enforcement of individual criminal responsibility, States were obliged under international law to take appropriate measures and enact legislation ensuring prosecution and punishment of persons guilty of international offences.
It added that “it was therefore necessary to establish a universal duty to prosecute offences, which included the obligation to co-operate in combating international offences”. 
German Democratic Republic, Statement before the Sixth Committee of the UN General Assembly, UN Doc. A/C.6/36/ SR.60, 26 November 1981, § 26.