---
title: "21.A.109 Obligations and EPA marking — Annex I, Initial Airworthiness · Avioverse"
description: "The holder of a minor change approval to a type-certificate shall:"
url: "https://avioverse.aero/regulations/easa/initial-airworthiness/annex-i/section-a-technical-requirements/21-a-109"
---

# 21.A.109 Obligations and EPA marking

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

IR Implementing rule

## 21.A.109 Obligations and EPA marking

The holder of a minor change approval to a type-certificate shall:

(a) undertake the obligations laid down in points 21.A.4, 21.A.5, 21.A.6, 21.A.7, 21.A.9 and 21.A.108; and

(b) specify the marking, including [EPA](https://avioverse.aero/glossary/easa/epa) (European Part Approval) letters, in accordance with point 21.A.804(a).

IR · 21.A.109 — Regulation (EU) No 748/2012 · Regulation (EU) 2022/201 · 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.