Among those standing trial once again are Jason W. and Ismail A, who were arrested in the Laakkwartier area of The Hague in November 2004.
Nouriddin El F. will also be in court again. He was arrested with a loaded machine gun at a station in Amsterdam in June 2005.
The public prosecution department appealed the court ruling last year because it felt that a number of legal matters had to be reassessed.
The most important witness in the case will be Mohammed B. B. was convicted in the ruling last year but not imposed any sentence as he is already serving a life sentence for the murder of Theo van Gogh.