---
title: "Article 12 Design of parts — Basic Regulation · Avioverse"
description: "Unless otherwise established by delegated acts referred to in Article 19, the design of parts shall be subject to certification and shall be issued with…"
url: "https://avioverse.aero/regulations/easa/basic-regulation/chapter-iii-substantive-requirements/article-12"
---

# Article 12 Design of parts

Basic Regulation · Regulation (EU) 2018/1139 · EAR revision 16 Jan 2023

IR Implementing rule

## Article 12 Design of parts

Unless otherwise established by delegated acts referred to in Article 19, the design of parts shall be subject to [certification](https://avioverse.aero/glossary/easa/certification) and shall be issued with a [certificate](https://avioverse.aero/glossary/easa/certificate).

That certificate shall be issued upon application, when the applicant has demonstrated that the design of the [part](https://avioverse.aero/glossary/easa/part) complies with the certification basis established in accordance with the delegated acts referred to in point (b)(iii) of Article 19(1).

That certificate may also be issued without such application, by an organisation approved in accordance with Article 15 which has been granted a privilege to issue those certificates in accordance with the delegated act referred to in point (k) of Article 19(1), when that organisation has determined that the design of the part complies with the certification basis established in accordance with the delegated acts referred to in point (b)(iii) of Article 19(1).

No separate certificate shall be required for the design of parts that have been certified as part of the design of a [product](https://avioverse.aero/glossary/easa/product) in accordance with Article 11.

IR · Article 12 — Regulation (EU) 2018/1139 · Basic Regulation Easy Access Rules · EAR revision 16 Jan 2023

[All rules in CHAPTER III – SUBSTANTIVE REQUIREMENTS](https://avioverse.aero/regulations/easa/basic-regulation/chapter-iii-substantive-requirements)

Consolidated from the EASA Easy Access Rules (revision 16 Jan 2023, 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.