(b) if the journey is undertaken by private motor vehicle to transport the member or her/his spouse or companion, dependant, parent or parent-in-law to the airport, or to fetch such person, at the higher of the AA rate or the government rate per km for the distance between her/his home base/constituency base or place of residence to the nearest airport and back to the home base/constituency base or place of residence; and (c) the journey is undertaken by public transport or taxi, the actual cost of such journey, provided it is reasonable and competitive.