Article 4: Period of validity - Commission Implementing Decision (EU) 2017/2333 of 13 December 2017 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 2018 (notified under document C(2017) 8317) (Only the Croatian, Czech, Dutch, English, French, German, Greek, Italian, Latvian, Maltese, Polish, Portuguese, and Spanish texts are authentic)