The other, more important obstacle is the manufacturers. The MSMA are not disposed to allow production engines to be raced in the series, and though they may not be able to block a proposal in the Grand Prix Commission, they always have the nuclear option - pulling out of MotoGP altogether. That would be a very high risk strategy indeed, as the marketing benefit that they receive from having Valentino Rossi, Dani Pedrosa, Jorge Lorenzo, Casey Stoner, Nicky Hayden et al on their bikes is huge, and may outweigh any political advantage they get from pulling out of the series.
This is not yet settled, not by a very long way indeed.
There is no way the manufacturers would take the nuclear option. The fans want this,the riders want this.All they have to do is look at the fan reaction to DMG for going against the will of the people. If the fan percieves the OEM;s as being the hangup to a switch,they would be on the wrong end of the angry hoard. They had better listen up