Vanuatu's opposition leader, Edward Natapei, says Fiji's Commodore Frank Bainimarama should not become the new chairman of the Melanesian Spearhead Group.
Mr Natapei has also condemned the decision of the new Vanuatu prime minister, Sato Kilman, to support the plan to make the Fiji interim prime minister the MSG head.
He made the comment after Mr Kilman left for Honiara to reconcile Vanuatu with Fiji and to join a Solomon Islands-sponsored process to make Fiji the MSG head.
In July, when Mr Natapei was the prime minister, he cancelled the MSG summit to stop the Fiji coup leader from taking the chair.
Mr Natapei says he accepts that Fiji is an MSG member that can participate in any MSG activities but not for it to hold the chairmanship.
He says if Fiji takes the MSG chairmanship, the organisation will be put into question by democratic countries.