The document explains the principles of cash flow hedges under IAS 21 and IAS 39, detailing how derivatives are used to manage future cash flows related to recognized assets or liabilities and foreign currency risks. It outlines the accounting treatment for effective hedges, stating that their fair value is recorded in equity until the hedged transaction affects the income statement, while also noting limitations on what can be hedged. Furthermore, it specifies requirements for consolidating entities and reporting cumulative changes, highlighting rules that distinguish cash flow hedges from fair value hedges.