Fully agree with Adrian's post and you would be foolish to attempt a flight there in anything but good conditions without the full mountain rating.
However on the "altiport sign off" you are shown how to fly to the circuit from far out as Chambery and the cables across the valley etc. If the weather was not suitable one could stay in Chambery and wait for an improvement. If all you want to do is use the altiport I consider the "sign off" to be enough.
I would love to do the full rating one day
