IAS 21 The Effects of Changes in Foreign Exchange Rates (paras. 218-224)
218 An entity shall disclose:
(a) the amount of exchange differences recognised in profit or loss except for those arising on financial instruments measured at fair value through profit or loss in accordance with IFRS 9; and
(b) net exchange differences recognised in other comprehensive income and accumulated in a separate component of equity, and a reconciliation of the amount of such exchange differences at the beginning and end of the reporting period.
219 When the presentation currency is different from the functional currency, an entity shall disclose that fact together with the functional currency and the reason for using a different presentation currency.
220 When there is a change in the functional currency of either the reporting entity or a significant foreign operation, an entity shall disclose that fact and the reason for the change in functional currency.
Disclosure when a currency is not exchangeable
221 When an entity estimates a spot exchange rate because a currency is not exchangeable into another currency (see paragraph 19A of IAS 21), the entity shall disclose information that enables users of its financial statements to understand how the currency not being exchangeable into the other currency affects, or is expected to affect, the entity's financial performance, financial position and cash flows. To achieve this objective, an entity shall disclose information about: