Worshop “Preparation of Licensing Documentation for Decommissioning and Licensing Process“ organized by IAEA was held in Slavutich city in Ukraine during 4th – 7th November 2013. Matej Zachar from company DECOM attended this workshop and technical visit of Cernobyl NPP as well. He made several presentations regarding requirements of regulatory authority on licinsing and planning of process of decommissioning in Slovakia.