Judgment of the Court of Justice of the European Union of 28 April 2016 (C‑191/14, C‑192/14, C‑295/14, C‑389/14 and C‑391/14 to C‑393/14) creates dual system of the CSCF's application within the same, third trading period of the EU ETS, as both legal frameworks - the invalidated, and the new one - will be binding, however, for different years.