Melanesian Spearhead Group leaders meeting this week in the Papua New Guinea capital are expected to formulate a decision on a West Papuan bid to join the grouping.
The leaders have been briefed on the outcomes of the MSG Foreign Ministers delegation to Indonesia's Papua region in January.
The trip, which was boycotted by Vanuatu, was aimed at fact-gathering for the MSG decision on the West Papuan National Coalition for Liberation membership application which was lodged a year ago.
The Solomon Islands Foreign Minister Clay Forau was part of the delegation.
"We provided them with our findings during the recent trip to West Papua, and so it's for the leaders to decide whether for them to become a member of MSG or one other option for the leaders is to regard Indonesia's membership (MSG observer status) as representing the whole of Indonesia."
Clay Forau has indicated the leaders are likely to reject the West Papuan bid.