The preamble of the resolution also envisaged the completion of ICTY and ICTR investigations by 2004, trials by the end of 2008 and all work in 2010 by concentrating on the prosecution of senior leaders.[2] Lower-level officials would be tried at a national level.[3] The strengthening of national judicial systems was crucial to the ICTY and ICTR completion strategies, including the establishment of a war crimes chamber at the ICTY.