Chapter 3a MAINTENANCE OF VEHICLESF1 United Kingdom Repealed Original text. Later amendments are not shown. 16Certification of maintenance workshops 16aCertification of entities in charge of maintenance Annotations Textual amendments F1 Repealed by Regulation (EU) 2016/796 of the European Parliament and of the Council of 11 May 2016 on the European Union Agency for Railways and repealing Regulation (EC) No 881/2004 (Text with EEA relevance). Chapter 3a