These include: � in conjunction with the International Council on Mining and Metals and the World Conservation Union, an undertaking not to explore or mine in World Heritage properties and a commitment to take all possible steps to ensure that operations are not incompatible with the outstanding universal values of World Heritage properties � our policy on riverine tailings developed in conjunction with our Forum on Corporate Responsibility states we will not commit to a new mining project that disposes of waste rock or tailings into a river � our policy on deep sea tailings placement, developed in conjunction with our Forum on Corporate Responsibility, states 'BHP Billiton has decided not to pursue Deep Sea Tailings Placement (DSTP) as a potential tailing disposal option for any of its current prospects.