In December 2017 the International Accounting Standards Board issued amendments to IFRS 3 Business Combinations and IFRS 11 Joint Arrangements as part of the Annual Improvements to IFRS Standards 2015-2017 Cycle.
The amendments clarify how a company accounts for obtaining control (or joint control) of a business that is a joint operation if the company already holds an interest in that business.
International Accounting Standards Board September 2017