Draskovic, Serbia's current foreign minister, was at the time the leader of the strongest opposition party, the Serbian Renewal Movement. Four senior officials of the party were killed in the assassination.
Former JSO member Nenad Ilic, the driver of the truck used for the assassination, was also resentenced to 15 years' imprisonment, while Nenad Bujosevic, Branko Bercek, Dusan Maricic and Leonid Milivojevic were sentenced to 14 years' imprisonment, one year less than at the first trial in 2005.
The Supreme Court quashed the original verdicts due to allegedly incorrect facts.
Last year Ulemek and other JSO members were sentenced by the Special Court for Fighting Organised Crime for the assassination of Serbian President Ivan Stambolic and another attempt on Draskovic's life in 2000. The Supreme Court is expected to review soon the 40-year sentence given to Ulemek and Bercek.
Under the 2006 verdict, the Special Court sentenced Milivojevic and Maricic to 30 years's imprisonment, Bujosevic to 35, and Ilic and Radomir Markovic to 15 years each. The court said those crimes were committed on the orders of Serbia's then president, the late Slobodan Milosevic, and his wife Mirjana Markovic.