INDEPENDENCE GROUP NL ANNUAL REPORT 2017

Notes to the consolidated financial statements 30 June 2017 (continued) 12 Provisions (continued) (b) Recognition and measurement (continued) Provisions are measured at the present value of management's best estimate of the expenditure required to settle the present obligation at the end of the reporting period. The discount rate used to determine the present value is a pre-tax rate that reflects current market assessments of the time value of money and the risks specific to the liability. The increase in the provision due to the passage of time is recognised as rehabilitation and restoration borrowing expense in the profit or loss. (i) Rehabilitation and restoration Long-term environmental obligations are based on the Group’s environmental management plans, in compliance with current environmental and regulatory requirements. Full provision is made based on the net present value of the estimated cost of restoring the environmental disturbance that has occurred up to the reporting date. To the extent that future economic benefits are expected to arise, these costs are capitalised and amortised over the remaining lives of the mines. Annual increases in the provision relating to the change in the net present value of the provision are recognised as finance costs. The estimated costs of rehabilitation are reviewed annually and adjusted as appropriate for changes in legislation, technology or other circumstances. Cost estimates are not reduced by the potential proceeds from the sale of assets or from plant clean-up at closure. (ii) Employee benefits The provision for employee benefits represents annual leave and long service leave entitlements accrued by employees. Short-term obligations Liabilities for wages and salaries, including non-monetary benefits and accumulating sick leave that are expected to be settled wholly within 12 months after the end of the period in which the employees render the related service are recognised in respect of employees’ services up to the end of the reporting period and are measured at the amounts expected to be paid when the liabilities are settled. The amounts are presented as current employee entitlements in the balance sheet. Other long-term employee benefit obligations The liabilities for long service leave and annual leave are not expected to be settled wholly within 12 months after the end of the period in which the employees render the related service. They are therefore measured as the present value of expected future payments to be made in respect of services provided by employees up to the end of the reporting period using the projected unit credit method. Consideration is given to expected future wage and salary levels, experience of employee departures and periods of service. Expected future payments are discounted using market yields at the end of the reporting period of government bonds with terms and currencies that match, as closely as possible, the estimated future cash outflows. Remeasurements as a result of experience adjustments and changes in actuarial assumptions are recognised in profit or loss. The obligations are presented as current liabilities in the consolidated balance sheet if the entity does not have an unconditional right to defer settlement for at least twelve months after the reporting date, regardless of when the actual settlement is expected to occur. (c) Key estimates and judgements Rehabilitation and restoration provisions The provision for rehabilitation and restoration costs is based on the net present value of the estimated cost of restoring the environmental disturbance that has occurred up to the reporting date. Significant estimates and assumptions are made in determining the provision for mine rehabilitation as there are numerous factors that will affect the ultimate liability payable. These factors include estimates of the extent and costs of rehabilitation activities, technological changes, regulatory changes, cost increases as compared to the inflation rates and changes in discount rates. These uncertainties may result in future actual expenditure differing from the amounts currently provided. The provision at reporting date represents management’s best estimate of the present value of the future rehabilitation costs required. Long service leave Long service leave is measured at the present value of benefits accumulated up to the end of the reporting period. The liability is discounted using an appropriate discount rate. Management requires judgement to determine key assumptions used in the calculation, including future increases in salaries and wages, future on-costs rates and future settlement dates of employees' departures. Independence Group NL 54 84 — IGO ANNUAL REPORT 2017 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS FOR THE YEAR ENDED 30 JUNE 2017