Formula 1 chiefs must push through an overhaul of the sport at next week's crunch Strategy Group meeting, claims Red Bull motorsport adviser Helmut Marko.
The teams, the FIA and Bernie Ecclestone are due to get together at Biggin Hill next Thursday to discuss a raft of regulation changes aimed at improving F1 over the next two years.
Marko thinks it essential that action is taken now – hinting once again that Red Bull's future in F1 could be in doubt if things do not change.
"I hope something reasonable comes out of the meeting," he told the Austrian APA news agency.
"It is important not only for us but for the whole of Formula 1. TV ratings and crowds are down; there are hardly any new sponsors.
"Our boss (Dietrich Mateschitz) has already indicated that we will need to rethink our engagement if something does not change."
Beyond specific rule changes to improve cars and engines, Marko thinks that the whole governance structure of F1 needs a rethink.
"The system with the FIA, FOM and the teams does not work," he explained. "You cannot always ask everybody what they want. There should be an independent mechanism."