For Adventure class:
As it is a single seater vehicle, only one driver will drive during the endurance. However, if teams asthere are two drivers from each team, then both should have their own complete safety gear which they have to present in front of Technical Inspector during thesafety check.
For Professional Class:
As it has occupancy of more than one, i.e.; driver + passengers will be seated in the vehicle. And during the dynamic event, as it is mentioned all the occupants must be present in the vehicle, thus passengers and driver should have complete safety gear.
Example, if a team has built a vehicle with occupancy of 4 (1 driver + 3 passengers). So during dynamic rounds, 3 team members and 1 driver will be seated in the vehicle. Thus along with the driver, rest of the 3 team members should also have complete driving safety gears, which they have to present in front of the Technical Inspector.