CELEX number of EUR-Lex documents

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What is a CELEX number?

The CELEX number is a unique identifier for every document in EUR-Lex – regardless of language.

Learning how to read a CELEX number will help you search faster and understand how documents are related .

It has 4 parts :

Illustration of the composition of the CELEX number: It is composed of 4 parts - one digit for the sector, four digits for the year, one or two letters for the type of document and usually 4 digits for the number of document

Exceptions: Some documents, such as treaty protocols or declarations have a slightly different CELEX structure. For more information, see how CELEX numbers are composed (available in English only, last updated 04/2017).

CELEX number infographics A3 printout (PDF)


Documents on EUR-Lex are classified into 12 sectors .


    • 1 Treaties
    • 2 International agreements
    • 3 Legislation
    • 4 Complementary legislation
    • 5 Preparatory acts
    • 6 Case-law
    • 7 National transposition measures
    • 8 References to national case-law concerning EU law
    • 9 Parliamentary questions
    • 0 Consolidated acts
    • C Other documents published in the Official Journal C series
    • E EFTA documents

Document type

Each document type has a descriptor .

Descriptors can have one or two letters .

Full list of descriptors

Some common descriptors:

  • Sector 3 - Legislation

    • L for Directives
    • R for Regulations
    • D for Decisions
  • Sector 6 - Case-law

    • CJ for Judgments by Court of Justice
    • CC for Opinions of the advocate-general
    • CO for Orders of the Court of Justice.
  • Sector 5 - Preparatory documents

    • PC for Legislative proposals by the Commission (COM documents), etc.
    • DC for other COM documents (green and white papers, communications, reports...)
    • SC for SWD documents (staff working documents, impact assessments...)
    • JC for JOIN documents (adopted jointly by the Commission and the High Representative)


Treaties (sector 1)

There are 3 digits after the descriptor.

They indicate the number of an article of Treaty.

For example:

11957E086 is the number for Article 86 of the EEC treaty (1957).

Consolidated versions of treaties

These are indicated by 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

International agreements (sector 2)

These are identified by publication date .

So the international agreement No. 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)

Case-law (sector 6)

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 .

For example:

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 amending, with R(xx) added at the end (xx being the number of the corrigendum).

For example:

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 acts (sector 0)

Consolidated acts have the same number as the basic act – but its sector is ‘0’ instead of ‘3’ .

It is followed by the date of application of the last amendment to the act (see our FAQ on consolidation ). For example: 02009L0156- 20161018 .