Simplify the following text for a Grade 6 native English-speaking person.
Original: With the 2008 Concorde Agreement outlawing customer cars from onwards , Dietrich Mateschitz put the Toro Rosso team up for sale in March 2008 .
Simplified: The 2008 contract between the FIA and the Formula One teams outlawing customer cars starting in . Because of this , Red Bull put the Toro Rosso team up for sale in March 2008 .