......the START line – Which is now NOT THE SAME as the FINISH line???!!!
But its only been the same for 50 years
There seem to be at least two sets of rules for rolling starts, and a third for the single file safety car restart. Racing will start either when the cars cross the finish line (in formation of course) or when the red lights go out. Being French, they don't use red lights, just a celebrity with an embroidered flag (the one that had to run out of the way 50 years ago)
If any car accelerates early, overtakes or breaks formation, they get penalised. If its complete mayhem then they might order a restart.
Reality: Everybody will floor it out of the Ford chichane and as a restart would be a great dishonour for the French, they'll let it go.
So no change there then!