| 2.21 | Current and deferred income taxation |
Income tax expense for the period comprises current and deferred tax. Income tax is recognised in net profit, except to the extent that it relates to items recognised directly in OCI where the income tax is recognised in OCI.
Current income tax assets and liabilities for the current period are calculated on the basis of the tax laws enacted or substantively enacted at the end of each reporting period in the jurisdictions where the Company and its subsidiaries operate and generate taxable income. Management periodically evaluates positions taken with respect to situations in which applicable tax regulations are subject to interpretation.
Deferred income tax is recognised, using the liability method, on temporary differences arising between the tax bases of assets and liabilities and their carrying amounts in the consolidated financial statements. Substantively enacted tax rates are used in the determination of deferred income tax.
Deferred income tax is provided on temporary differences arising on investments in subsidiaries, associates and joint ventures except where the timing of the reversal of the temporary difference can be controlled and it is probable that the temporary difference will not be reversed in the foreseeable future.
The carrying amount of deferred tax assets is reviewed at the end of each reporting period and reduced to the extent that it is no longer probable that sufficient taxable profit will be available to allow all or part of the deferred tax asset to be utilised. Conversely, previously unrecognised deferred tax assets are reassessed by the end of each reporting period and are recognised to the extent that it is probable that sufficient taxable profit will be available to allow all or part of the deferred tax asset to be utilised.
Deferred tax assets and liabilities are measured at the tax rates that are expected to apply to the period when the asset is realised or the liability is settled, based on tax rates (and tax laws) that have been enacted or substantively enacted at the end of the reporting period.
Deferred tax assets and deferred tax liabilities are offset if and only if the Group has a legally enforceable right to set off current tax assets and current tax liabilities and the deferred tax assets and deferred tax liabilities relate to income tax levied by the same taxation authority on either the same taxable entity or different taxable entities which intend either to settle current tax liabilities and assets on a net basis, or to realise the assets and settle the liabilities simultaneously, in each future period in which significant amounts of deferred tax liabilities or assets are expected to be settled or recovered.