ACT has put former party president Catherine Isaac at No 2 on its party list behind leader Don Brash.
The party had to re-jig its list after current deputy leader John Boscawen withdrew and announced he would not be seeking re-election from the list.
Dr Brash is No 1 on the ACT list.
The party had already indicated Ms Isaac would be given a high place on the list.
All other candidates will move up one place. Former Federated Farmers president Don Nicholson is third, while Epsom candidate John Banks is fourth.
Ms Isaac was party president from 2001-06 and is managing director of a communications business.