This document is an excerpt from the EUR-Lex website
Most documents in EUR-Lex – regardless of the language they are written in – are assigned a CELEX number, which is a unique identifier.
Learning how to read these numbers will help you search faster and understand how documents relate to each other.
There are 4 parts to a CELEX number:
Exceptions: some documents, such as treaties, national transposition measures or national case-law have a slightly different CELEX structure. For more information, see how CELEX numbers are made up (available in English only, last updated April 2017).
|6||EU case law|
|8||References to national case-law concerning EU law|
|C||Other documents published in the Official Journal C series|
The year of the CELEX describes the year of the publication, official number, internal number, etc.
In most cases, it is linked to the document number.
Each document type has a descriptor.
Descriptors can have 1 or 2 letters.
Most CELEX numbers end in 4 digits. These reflect different types of information, e.g.:
Official number - 32017R2394. This is a sequential number showing when the document was published in the Official Journal. It is assigned by the Publications Office.
Internal number - 52018PC0033. This is assigned by the author of the document, the Commission in this case.
Date of publication - 32012A0424(01). This shows the month and day of publication in the Official Journal. It is followed by a sequential number in brackets, as other similar CELEX numbers might have been published on the same day.
There are 3 digits after the descriptor.
They indicate the number of an article of the Treaty.
11957E086 is the number for Article 86 of the EEC treaty (1957).
These are indicated by the year of consolidation , e.g.
Treaty on the Functioning of the European Union:
12016E – table of contents, consolidated version 2016
12016E/TXT – consolidated version 2016
12016E003 – Article 3, consolidated version 2016.
These agreements are identified by their publication date.
So the international agreement 22006A1230(03) was published in the Official Journal on 30 December 2006.
If several agreements are published on the same day, only the number in brackets changes: e.g. 22006A1230 (01)
The document number is based on the case number issued by the Court of Justice.
The year is the year in which the case entered the Court’s register.
6 2004 TJ0 201
This is the judgment in the 201st case entered in the register in 2004.
The case number is T-201/04.
Corrigenda have the same number as the document they are correcting, with R(xx) added at the end (xx being the number of the corrigendum).
32009L0164R( 01 ) is the first corrigendum to Directive 32009L0164 .
A corrigendum may relate to one or more language versions – or even all of them.
Consolidated texts have the same number as the basic act – but their sector is ‘0’.
It is followed by the date of application of the last amendment to the act (see our FAQ on consolidation ). For example: 02009L0156- 20161018 .