---
title: "21L.B.141 Initial oversight investigation — Annex Ib, Initial Airworthiness · Avioverse"
description: "Upon receiving a declaration from an organisation declaring their production capability, the competent authority shall verify that:"
url: "https://avioverse.aero/regulations/easa/initial-airworthiness/annex-ib/section-b-procedures-for-competent-authorities/21l-b-141"
---

# 21L.B.141 Initial oversight investigation

Annex Ib · Regulation (EU) No 748/2012 · EAR revision 27 Nov 2025

IR Implementing rule

## 21L.B.141 Initial oversight investigation

(a) Upon receiving a declaration from an organisation declaring their production capability, the competent authority shall verify that:

1\. the declarant is eligible to declare their production capability in accordance with point 21L.A.122;

2\. the declaration contains all the information specified in point (c) of point 21L.A.123; and

3\. the declaration does not contain information that indicates a non-compliance with the requirements of Subpart G of Section A of this Annex.

(b) The competent authority shall acknowledge the receipt of the declaration, including the assignment of an individual declared production organisation reference number to the declarant.

IR · 21L.B.141 — Regulation (EU) No 748/2012 · Regulation (EU) 2022/1361 · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

AMC Acceptable means of compliance

## AMC1 21L.B.141 Initial oversight investigation

Upon receiving a declaration from an organisation that declares its production capability, the competent authority should appoint a suitable member of its technical staff as the team leader (i.e. focal point) to be in charge of the verification and registration of the declaration and, subsequently, the oversight of the organisation. If needed, the team leader should be supported by one or more team members.

The competent authority should perform sufficient verification activities to be satisfied that the declarant is compliant with the requirements of Subpart G of Section A of this Annex.

AMC · AMC1 21L.B.141 — Regulation (EU) No 748/2012 · ED Decision 2023/013/R · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

[All rules in SECTION B - PROCEDURES FOR COMPETENT AUTHORITIES](https://avioverse.aero/regulations/easa/initial-airworthiness/annex-ib/section-b-procedures-for-competent-authorities)

Consolidated from the EASA Easy Access Rules (revision 27 Nov 2025, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.