29For that purpose, Article 10a of Directive 2003/87 provides, with regard to installations in certain sectors of activity, for the free allocation of emission allowances, the quantity of which is to decrease gradually over the period 2013-2020, with a view to reaching the complete abolition of free allowances in 2027 (see, to that effect, judgments of 8 September 2016, E.ON Kraftwerke, C‑461/15, EU:C:2016:648, paragraph 24, and of 26 October 2016, Yara Suomi and Others, C‑506/14, EU:C:2016:799, paragraph 46).
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