Commission Implementing Decision (EU) 2019/1957 of 25 November 2019 on the assessment made pursuant to Regulation (EU) 2018/1139 of the European Parliament and of the Council as regards an exemption from certain substantive requirements laid down in Commission Implementing Regulation (EU) No 923/2012 granted by the United Kingdom (notified under document C(2019) 8345) (Only the English text is authentic) (Text with EEA relevance)