Commission Implementing Decision (EU) 2020/1604 of 23 October 2020 determining, pursuant to Regulation (EU) No 517/2014 of the European Parliament and of the Council on fluorinated greenhouse gases, reference values for the period 1 January 2021 to 31 December 2023 for each producer or importer which has lawfully placed hydrofluorocarbons on the market in the Union from 1 January 2015, as reported under that Regulation (notified under document C(2020) 9500)