The Bougainville Mining Lease cannot be reviewed, despite its recent expiration, because of an automatic 21-year extension clause under the Bougainville Agreement.
Such is the case facing the once prolific world copper producer but the Government will be working with all affected stakeholders, including landowners to find ways to reverse the process.
See http://mekamui.wordpress.com/2011/11/25/bville-mining-lease-expires%E2%80%A8%E2%80%A8/.