144 FINANCIAL STATEMENTS Operating leases as lessee Operating lease payments are recognised as an expense on a straight-line basis over the lease term unless: another systematic basis is representative of the time pattern of the benefit from the leased asset, even if the payments are not on that basis, or the payments are structured to increase in line with expected general inflation (based on published indexes or statistics) to compensate for the lessor's expected inflationary cost increases. Any contingent rents are expensed in the period they are incurred. 2.13 TRUST FUNDS Trust funds consist of trust funds invested and the corresponding trust creditors for the utilisation of funds for specific projects as approved by the Congress. 2.14 EMPLOYEE BENEFIT OBLIGATIONS Short-term employee benefits The cost of short-term employee benefits, (those payable within 12 months after the service is rendered, such as paid vacation leave and sick leave, bonuses, and non-monetary benefits such as medical care), are recognised in the period in which the service is rendered and are not discounted. Defined contribution plans Payments to defined contribution retirement benefit plans are charged as an expense as they fall due. 2.15 BORROWING COSTS All borrowing costs are recognised in surplus or deficit in the period in which they are incurred. 2.16 IMPAIRMENT OF NON-FINANCIAL ASSETS The group and organisation assesses at each reporting date whether there is any indication that property, plant and equipment and intangible assets may be impaired. If there is any such indication, the recoverable amount of any affected asset (or group of related assets) is estimated and compared with its carrying amount. If the estimated recoverable amount is lower, the carrying amount is reduced to its estimated recoverable amount, and an impairment loss is recognised immediately in profit or loss. If an impairment loss subsequently gets reversed, the carrying amount of the asset (or group of related assets) is increased to the revised estimate of its recoverable amount, but not in excess of the amount that would have been determined had no impairment loss been recognised for the asset (or group of assets) in prior years. A reversal of impairment is recognised immediately in profit or loss.
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