Some news about sporting regulations are spotted in the News section of gp2series.com:
Few changes after the start of 2005 season:
http://www.gp2series.com/en/website/...ews=tcm:2-2678
2006 modifies to the sporting and technical regulations:
http://www.gp2series.com/en/website/...ews=tcm:2-6733