Regulation (EU) 2019/1383
For the purpose of this Annex (Part-CAO):
(1) the competent authority shall be:
(a) for organisations having their principal place of business in a Member State, the authority designated by that Member State;
(b) for organisations having their principal place of business in a third country, the Agency.
(2) 'owner' means the person responsible for the continuing airworthiness of the aircraft, including the following persons:
(i) the registered owner of the aircraft;
(ii) the lessee in the case of a leasing contract;
(iii) the operator.