sentences:  The official league, which launched in April 2008, is called the Indian Premier League Twenty20 cricket.The league model is based on the franchise model of the National Football League and Major League Baseball in the US.In August 2007, the ICL filed a petition against the BCCI in the Delhi High Court accusing the BCCI of threatening and intimidating them and other state organisations, and asked the court to stop BCCI from interfering with its attempts to sign up players for its tournaments.