---
title: "GM1 to 21L.A.127(c) Obligations of the declared production organisation — Annex Ib, Initial Airworthiness · Avioverse"
description: "CONFORMITY WITH APPROVED OR DECLARED DESIGN DATA Individual configurations are often based on the needs of the customer and improvements or changes which…"
url: "https://avioverse.aero/regulations/easa/initial-airworthiness/annex-ib/section-a-technical-requirements/gm1-to-21l-a-127-c-obligations-of-the-declared-production-organisation"
---

# GM1 to 21L.A.127(c) Obligations of the declared production organisation

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

GM Guidance material

## GM1 to 21L.A.127(c) Obligations of the declared production organisation

CONFORMITY WITH APPROVED OR DECLARED DESIGN DATA

Individual configurations are often based on the needs of the customer and improvements or changes which may be introduced by the type-certificate holder or the declarant of a declaration of design compliance. There are also likely to be unintentional deviations (concessions or non-conformances) during the manufacturing process. All these changes should be subject to approval by the design approval holder or the declarant, as relevant, or, when necessary, by EASA.

GM — 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.