---
title: "ARA.DTO.100 Declaration to the competent authority — Part-ARA · Avioverse"
description: "Upon receiving a declaration from a DTO, the competent authority shall verify that the declaration contains all the information specified in point…"
url: "https://avioverse.aero/regulations/easa/aircrew/part-ara/subpart-dto/ara-dto-100"
---

# ARA.DTO.100 Declaration to the competent authority

ANNEX VI (Part-ARA) · Regulation (EU) No 1178/2011 · EAR revision 16 Oct 2026

Official sources: [EASA Easy Access Rules (opens in a new tab)](https://www.easa.europa.eu/en/document-library/easy-access-rules/easy-access-rules-aircrew) · [EUR-Lex 2011/1178 (opens in a new tab)](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32011R1178)

IR Implementing rule

## ARA.DTO.100 Declaration to the competent authority

(a) Upon receiving a declaration from a DTO, the competent authority shall verify that the declaration contains all the information specified in point DTO.GEN.115 of Annex VIII (Part-DTO) and acknowledge receipt of the declaration, including the assignment of an individual DTO reference number to the representative of the DTO.

(b) If the declaration does not contain the required information or contains information that indicates a non-compliance with the essential requirements set out in Annex IV to Regulation (EU) 2018/1139, with the requirements of Annex I (Part-FCL) and Annex VIII (Part-DTO) to this Regulation, or with the requirements of Annex III (Part-BFCL) to Commission Regulation (EU) 2018/395 and Annex III (Part-SFCL) to Commission Implementing Regulation (EU) 2018/1976, the competent authority shall act in accordance with point ARA.GEN.350(da).

IR · ARA.DTO.100 — Regulation (EU) No 1178/2011 · Regulation (EU) 2020/359 · Aircrew Easy Access Rules · EAR revision 16 Oct 2026

AMC Acceptable means of compliance

## AMC1 ARA.DTO.100(a) Declaration to the competent authority

ACKNOWLEDGEMENT OF RECEIPT OF THE DECLARATION

The competent authority should acknowledge receipt of the declaration to the DTO in writing within 10 working days.

AMC · AMC1 ARA.DTO.100(a) — Regulation (EU) No 1178/2011 · ED Decision 2018/009/R · Aircrew Easy Access Rules · EAR revision 16 Oct 2026

GM Guidance material

## GM1 ARA.DTO.100(a) Declaration to the competent authority

ASSIGNMENT OF AN INDIVIDUAL DTO REFERENCE NUMBER

It is recommended to create DTO reference numbers by commencing with the UN country code of the State of the competent authority to which the declaration is sent, followed by the term ‘.DTO.’ and a consecutive numbering (example: AT.DTO.001).

GM · GM1 ARA.DTO.100(a) — Regulation (EU) No 1178/2011 · ED Decision 2018/009/R · Aircrew Easy Access Rules · EAR revision 16 Oct 2026

GM Guidance material

## GM2 ARA.DTO.100(a) Declaration to the competent authority

The [verification](https://avioverse.aero/glossary/easa/verification) made by the competent authority upon receipt of the declaration does not imply an inspection. The aim is to check whether the declaration complies with the applicable requirements.

GM · GM2 ARA.DTO.100(a) — Regulation (EU) No 1178/2011 · ED Decision 2018/009/R · Aircrew Easy Access Rules · EAR revision 16 Oct 2026

[All rules in SUBPART DTO – SPECIFIC REQUIREMENTS RELATING TO DECLARED TRAINING ORGANISATIONS (DTOs)](https://avioverse.aero/regulations/easa/aircrew/part-ara/subpart-dto)

Consolidated from the EASA Easy Access Rules (revision 16 Oct 2026, extracted 2 Nov 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.