Commission Implementing Regulation (EU) 2021/876 of 31 May 2021 laying down rules for the application of Regulation (EC) No 1907/2006 as regards applications for authorisation and review reports for the uses of substances in the production of legacy spare parts and in the repair of articles and complex products no longer produced and amending Regulation (EC) No 340/2008 (Text with EEA relevance)