Article 4: Period of validity - Commission implementing Decision (EU) 2019/2079 of 27 November 2019 determining quantitative limits and allocating quotas for substances controlled under Regulation (EC) No 1005/2009 of the European Parliament and of the Council on substances that deplete the ozone layer, for the period 1 January to 31 December 2020 (notified underdocument C(2019) 8535) (Only the Croatian, Czech, Dutch, English, French, German, Greek, Hungarian, Italian, Latvian, Maltese, Polish, Portuguese and Spanish texts are authentic)