The Vanuatu opposition leader, Edward Natapei, has called on the government to reverse its stance on West Papua ahead of the July summit of the Melanesian Spearhead Group.
This comes after a Papuan activist, Benny Wenda, visited Port Vila on a regional tour from his exile in Britain.
Two years ago, Vanuatu's prime minister, Sato Kilman, backed Papua New Guinea, Fiji and Solomon Islands in admitting Jakarta as an MSG observer.
Mr Natapei says he wants Mr Kilman to reverse his stance.
"I called on the government to review that decision with a view to admitting West Papua as the member of the MSG and to actually terminate the observer status of the government of Indonesia."
Vanuatu opposition leader, Edward Natapei, says the change should be made during the MSG summit in New Caledonia in July.