The four Labour leadership contenders have defended using taxpayer funded flights for their campaigns, saying most of the other costs will have to come out of their own pockets.
The four -- Andrew Little, Nanaia Mahuta, David Parker and Grant Robertson -- were at Labour Party HQ this morning to sign a Code of Conduct and go through the campaign rules.
They can use the MPs' unlimited air travel allowance to travel around the campaign -- but have to pay for any other costs themselves including hotels, taxis and meals.
Mr Robertson said the use of air travel was within the rules. "[The taxpayer] is not picking up the tab for the contest. We are obeying the rules we have around airline travel. Everything else is our own cost."
Mr Little said the contest did involve meeting with the public, which was part of an MPs' job.