Tomorrow, on Day 2 of the Maraton Stage, you are allowed to enter the Parc Ferme, 30 minutes before your expected Stage Start.
If you are switching your tracking / safety devices OF, durin the night, EXCLUSIVELY, towmorrow, you are allowed to switche them ON, 30 minutes before your Stage Start.
So, shortly, you can turn on your Tracking / safety device, when you enter the Parc Ferme!