Commission Implementing Decision (EU) 2019/1389 of 4 September 2019 authorising derogations from Regulation (EU) No 1307/2013 of the European Parliament and of the Council and from Commission Delegated Regulation (EU) No 639/2014 as regards the implementation of certain conditions relating to the greening payment for claim year 2019 in Belgium, Spain, France, Lithuania, Poland and Portugal (notified under document C(2019) 6438)