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Whitehaven Coal Limited : Annual Report 2010
Whitehaven Coal Limited -- Annual Report 2010 61 NOTES TO THE FINANCIAL STATEMENTS 30 JUNE 2010 3.S UMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) q) Employee benefits (continued) (ii) Long-term service benefits The consolidated entity's net obligation in respect of long-term service benefits is the amount of future benefit that employees have earned in return for their service in the current and prior periods. The obligation is calculated using expected future increases in wage and salary rates including related on-costs and expected settlement dates, and is discounted using the rates attached to the Commonwealth Government bonds at the balance date which have maturity dates approximating to the terms of the consolidated entity's obligations. (iii) Defined contribution superannuation funds Obligations for contributions to defined contribution superannuation funds are recognised as an expense in the statement of comprehensive income as incurred. (iv) Share-based payment transactions The grant date fair value of options granted to employees is recognised as an expense, with a corresponding increase in equity, over the period in which the employees become unconditionally entitled to the options. The amount recognised is adjusted to reflect the actual number of share options that vest, except for those that fail to vest due to market conditions not being met. r) Provisions A provision is recognised in the statement of financial position when the consolidated entity has a present legal or constructive obligation as a result of a past event, and it is probable that an outflow of resources embodying economic benefits will be required to settle the obligation and a reliable estimate can be made of the amount of the obligation. Provisions are determined by discounting the expected future cash flows at a pre-tax rate that reflects current market assessments of the time value of money and, where appropriate, the risks specific to the liability. (i) Mine rehabilitation and closure Provisions are made for the estimated cost of rehabilitation relating to areas disturbed during the mine's operation up to reporting date but not yet rehabilitated. Provision has been made in full for all disturbed areas at the reporting date based on current estimates of costs to rehabilitate such areas, discounted to their present value based on expected future cashflows. The estimated cost of rehabilitation includes the current cost of re-contouring, topsoiling and revegetation based on legislative requirements. Changes in estimates are dealt with on a prospective basis as they arise. Significant uncertainty exists as to the amount of rehabilitation obligations which will be incurred due to the impact of changes in environmental legislation. The amount of the provision relating to rehabilitation of mine infrastructure and dismantling obligations is recognised at the commencement of the mining project and/or construction of the assets where a legal or constructive obligation exists at that time. The provision is recognised as a non-current liability with a corresponding asset included in mining property and development assets. At each reporting date the rehabilitation liability is re-measured in line with changes in discount rates, and timing or amount of the costs to be incurred. Changes in the liability relating to rehabilitation of mine infrastructure and dismantling obligations are added to or deducted from the related asset, other than the unwinding of the discount which is recognised as a finance cost in the statement of comprehensive income as it occurs. If the change in the liability results in a decrease in the liability that exceeds the carrying amount of the asset, the asset is written-down to nil and the excess is recognised immediately in the statement of comprehensive income. If the change in the liability results in an addition to the cost of the asset, the recoverability of the new carrying amount is considered. Where there is an indication that the new carrying amount is not fully recoverable, an impairment test is performed with the write-down recognised in the statement of comprehensive income in the period in which it occurs.
Annual Report 2009
Annual Report 2011