16.5. Commission Regulation (EU) 2016/539 of 6 April 2016 amending Regulation (EU) No. 1178/2011 as regards pilot training, testing and periodic checking for performance-based navigation - European Air Law View the chapter 16.5. Commission Regulation (EU) 2016/539 of 6 April 2016 amending Regulation (EU) No. 1178/2011 as regards pilot training, testing and periodic checking for performance-based navigation by - European Air Law 16.5. Commission Regulation (EU) 2016/539 of 6 April 2016 amending Regulation (EU) No. 1178/2011 as regards pilot training, testing and periodic checking for performance-based navigation