Article 6
The exemption given in respect of regulation 16(1)(e)(iii) shall apply only in relation to an exempted vehicle for a period during which the operator provides in that vehicle or, where an exempted vehicle forms part of a train, in that train a person, other than the driver of that vehicle or train, who is reasonably available to assist a disabled person in a wheelchair in that vehicle in the event of an emergency (whether or not the device required by regulation 16(1)(e) has been operated).