Voting is underway in the election for the remaining vacancy on the board of Fonterra.
Only two candidates from the first election, Leonie Guiney and Peter McBride, secured more than 50 percent support from shareholders' voting earlier in 2018.
Election rules mean if not enough candidates get more than 50 percent support, there must be a second election.
This is the first time a second director election has been required, and it was decided by the Shareholders' Council that it will be a vote between the unsuccessful candidates nominated in the first election who wish to re-stand.
Consequently, this election is between self-nominated candidate John Nicholls and Jamie Tuuta, who was nominated by the board having been recommended by the Independent Selection Panel.
The voting period runs from Tuesday, December 4 to 1pm on Thursday, December 20.
The results will be delivered after the close of voting, and the successful candidate will take office immediately.