Bougainville war Many in Bougainville are determined to prevent Rio Tinto subsidiary Bougainville Copper Limited (BCL) returning to the island.  The company’s Panguna copper and gold mine triggered a war with the Papua New Guinea Defence Force, backed by Australia. See the articles below about the new law and the views of its opponents. Press Release and Full Speech : NEW MINING LAW A REJECTION OF THE PAST: MOMIS Bougainville passes divisive foreign Mining Law President Momis relies on convicted murderer for backup over mining bill