(19)To ensure that a single competent authority is identified with certainty for emission allowance market participants, the competent authority for the purpose of the notifications under Article 17(4) of Regulation (EU) No 596/2014 should be the competent authority of the Member State where the emission allowance market participant is registered, as under Article 19(2) of that Regulation, rather than the competent authority of each of the trading venues where the emission allowances are traded.