By 2001, FIA admitted that it had trouble patrolling driver aids and effective from the 2001 Spanish Grand Prix, the FIA made the decision to permit traction control, launch control, and fully automatic transmissions once more. Launch control and fully automatic transmissions were banned again in 2004, followed by teams being required to use a spec ECU unit in 2008 to prevent teams from concealing traction control and other electronic driver aids.