For the purposes of section 30 of the Act, any additional transport costs for one or more persons (other than family members) to travel with a member by unscheduled commercial transport within Australia are prescribed if:
(a) transport costs prescribed by this instrument could be claimed for the travel by the member by the kind of unscheduled commercial transport concerned if the member travelled without the other person or persons; and
(b) the travel by the other person or persons is reasonably required for the conduct of the member's parliamentary business.