---
title: "GM No 1 to 21.A.251 Terms of approval — Annex I, Initial Airworthiness · Avioverse"
description: "The terms of approval are stated on the certificate of approval issued by the Agency."
url: "https://avioverse.aero/regulations/easa/initial-airworthiness/annex-i/section-a-technical-requirements/gm-no-1-to-21-a-251-terms-of-approval"
---

# GM No 1 to 21.A.251 Terms of approval

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

GM Guidance material

## GM No 1 to 21.A.251 Terms of approval

1\. The terms of approval are stated on the certificate of approval issued by the Agency. The certificate states the scope of work and the products, changes or repairs thereof, with the appropriate limitations for which the approval has been granted. For design organisation approval covering type certification or [ETSO](https://avioverse.aero/glossary/easa/etso) authorisation for APU, the list of product types covered by the design assurance system should be included.

2\. Approval of a change in the terms of approval in accordance with 21.A.253 will be confirmed by an appropriate amendment of the certificate of approval.

3\. The certificate references the handbook of the approved design organisation, provided in accordance with 21.A.243. This handbook defines the tasks which may be performed under the approval.

4\. Scopes of work are, for example, ‘subsonic turbojet aeroplanes’, ‘turbopropeller aeroplanes’, ‘small aeroplanes’, ‘rotorcraft’... Technologies are quoted in the scope of work when it is considered by the Agency as a limitation for the design organisation approval.

5\. For repair design activities, the certificate states the scope of work with the appropriate limitations for which the approval has been granted.

GM — Regulation (EU) No 748/2012 · ED Decision 2012/020/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-i/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.