41For that purpose, Article 10a of that directive provides, with regard to installations in certain sectors of activity, for the free allocation of emission allowances, the quantity of which, in accordance with Article 10a(11), is to decrease gradually over the third trading period, with a view to reaching the complete abolition of free allowances in 2027 (see, to that effect, judgment of 20 June 2019, ExxonMobil Production Deutschland, C‑682/17, EU:C:2019:518, paragraph 65 and the case-law cited).
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