---
title: "21L.A.101 Scope — Annex Ib, Initial Airworthiness · Avioverse"
description: "This Subpart establishes: the procedure for declaring the compliance of a change to the design of an aircraft which was subject to a declaration made in…"
url: "https://avioverse.aero/regulations/easa/initial-airworthiness/annex-ib/section-a-technical-requirements/21l-a-101"
---

# 21L.A.101 Scope

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

IR Implementing rule

## 21L.A.101 Scope

This Subpart establishes:

(a) the procedure for declaring the compliance of a change to the design of an aircraft which was subject to a declaration made in accordance with Subpart C of this Annex;

(b) the rights and obligations of the declarant making a declaration of compliance of the change referred to in point (a); and

(c) provisions regarding the standard changes that do not require a declaration of design compliance.

IR · 21L.A.101 — Regulation (EU) No 748/2012 · Regulation (EU) 2022/1358 · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

GM Guidance material

## GM1 21L.A.101 Scope

The term ‘change to the design of an aircraft which was subject to a declaration’ is used in [Part 21 Light](https://avioverse.aero/glossary/easa/part-21-light) Subpart F, as well as in the related AMC and GM, to refer to any changes to the elements of the aircraft design data as defined in point 21L.A.46. Therefore, a declaration of design compliance should be required for any changes to the aircraft design data defined in point 21L.A.46.

GM · GM1 21L.A.101 — Regulation (EU) No 748/2012 · ED Decision 2023/013/R · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

[All rules in SECTION A - TECHNICAL REQUIREMENTS](https://avioverse.aero/regulations/easa/initial-airworthiness/annex-ib/section-a-technical-requirements)

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.