Mr Howard told ABC TV on Monday night that he and Mr Costello had an "agreed agreement" on the transition but refused to say how far into the next term it would happen.
Mr Costello on Tuesday also declined to detail the agreement or whether he would challenge for the leadership within 18 months after the November 24 federal election.
29 Oct 2007
Tell Me Who I'm Voting For Again
Costello can't say, won't say: