Ukraine
Practice Relating to Rule 161. International Cooperation in Criminal Proceedings
Ukraine’s IHL Manual (2004) states:
Each State shall be under the obligation to search for persons who have committed, or to have ordered to be committed, war crimes (including those crimes that were a result of a failure to take precautionary measures that had to be taken).
Any person charged with such crimes shall be handed over to a requesting State unless that person was brought to justice for serious violations of international humanitarian law in its own State.