Vortex 1
As a FI(R) you cannot operate without supervision. That means that a FI must be available in the club, in close vicinity i.e. on the airfield or flying in the local area where they are contactable by radio.
Supervision is not defined in legal terms so ultimately it would be a court that decides what level of supervision would be approprite in given circumstances, and that would most probably occur when someone is suing you for all you are worth.