26.10 Competent authority

• Regulation (EU) 2020/1159 found in: CS-26 Additional Airworthiness Specifications for Operations (No 2015/640) Part-26 (Mar 2023)
• Regulation (EU) 2024/2954 found in: CS-26 Additional Airworthiness Specifications for Operations (Part-26) (Oct 2025)

26.10 Competent authority Regulation (EU) 2020/1159 (a) For the purposes of this Annex, the competent authority to which operators need to demonstrate compliance of aircraft, the design of which has already been certified, with the requirements of this Annex shall be the authority designated by the Member State in which the operator has its principal place of business. (b) For the purposes of this Annex, the competent authority to which holders of type-certificates (TC), restricted TC, supplemental type-certificates (STC), changes and repair design approvals need to demonstrate compliance of the existing type-certificates (TC), restricted TC, supplemental type-certificates (STC), changes and repair design with the requirements of this Annex shall be the Agency. #### 26.10 Competent authority *Regulation (EU) 2024/2954* (a) For the purposes of this Annex, the competent authority to which an aircraft operator needs to demonstrate compliance of its aircraft, the design of which has already been certified, with the requirements of this Annex shall be the competent authority responsible for the oversight of that operator or the Agency if the responsibility for the oversight of the operator has been allocated to the Agency in accordance with Article 64 or 65 of [Regulation (EU) 2018/1139](https://eur-lex.europa.eu/eli/reg/2018/1139/oj/eng). (b) For the purposes of this Annex, the competent authority to which a holder of a type certificate (TC), restricted TC, supplemental type certificate (STC), design change approval or repair design approval needs to demonstrate compliance with the requirements of this Annex shall be the Agency.