---
title: "21.A.125C Duration and continued validity — Annex I, Initial Airworthiness · Avioverse"
description: "The letter of agreement shall be issued for a limited period of time that in any case shall not exceed 1 year."
url: "https://avioverse.aero/regulations/easa/initial-airworthiness/annex-i/section-a-technical-requirements/21-a-125c"
---

# 21.A.125C Duration and continued validity

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

IR Implementing rule

## 21.A.125C Duration and continued validity

(a) The letter of agreement shall be issued for a limited period of time that in any case shall not exceed 1 year. It shall remain valid subject to the organisation’s compliance with all the following conditions:

1\. the production organisation continues to comply with the applicable requirements of this Annex;

2\. the production organisation or any of its partners, suppliers or subcontractors acknowledges that the competent authority may carry out investigations in accordance with point 21.A.9;

3\. the production organisation is able to provide the competent authority with evidence showing that it maintains satisfactory control of the manufacture of products, parts, appliances, CMUs or CMU components under the letter of agreement;

4\. the letter of agreement has not been revoked by the competent authority under point 21.B.65, has not been surrendered by the production organisation, and its duration has not expired.

(b) Upon surrender, revocation or expiry, the letter of agreement shall be returned to the competent authority.

IR · 21.A.125C — Regulation (EU) No 748/2012 · Regulation (EU) 2024/1108 · 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.