IAS 27 Consolidated and Separate Financial Statements outlines when an entity must consolidate another entity, how to account for a change in ownership interest, how to prepare separate financial statements, and related disclosures. Consolidation is based on the concept of 'control' and changes in ownership interests while control is maintained are accounted for as transactions between owners as owners in equity.
IAS 27 was reissued in January 2008 and applies to annual periods beginning on or after 1 July 2009, and is superseded by IAS 27 Separate Financial Statements and IFRS 10 Consolidated Financial Statements with effect from annual periods beginning on or after 1 January 2013.