Red Bull Racing, Virgin and Mercedes GP fell foul of Formula 1's curfew regulations on Friday night after marketing personnel from the teams entered the Singapore track.
F1's rules state that no team personnel who are associated in any way with the operation of the cars are permitted within the confines of the circuit for a set period during the overnight hours. In Singapore, because of the night race timetable, this period ran from 9:30 a.m. on Saturday morning to 4 p.m., three hours before the start of final practice. However, the FIA said that marketing personnel from the three squads – which it says were "associated with the operation of the car" – were in the circuit during the exclusion period.
Teams are allowed four exceptions to the curfew over the course of the season, and while this was Mercedes GP's first breach and Marussia Virgin Racing's second, Red Bull Racing has now used up three of its curfews, with five races remaining. Scuderia Toro Rosso broke the curfew ahead of Friday practice after team principal Franz Tost arrived in the paddock too early.