How to read CELEX numbers — EUR-Lex navigation

Every EU legal document — every directive, regulation, decision, treaty, court judgment, and Commission proposal — has a unique CELEX identifier. Once you know how to read one you can navigate EUR-Lex like a regulator. CELEX numbers appear in your Declaration of Conformity, in harmonised-standard footnotes, in Official Journal references, and in conformity assessment correspondence with notified bodies. They are also the cleanest way to point at "the law as it currently stands" without ambiguity.

This tutorial decodes the CELEX format end-to-end using the format reference published on EUR-Lex's CELEX help page, then works through the example most relevant to hardware compliance: 32014L0053 = the Radio Equipment Directive.

The CELEX structure: four parts

Per EUR-Lex, a CELEX number consists of four main parts: Sector – Year – Document type – Document number. For a sector-3 legal act, that comes out to 10 characters: 1 + 4 + 1 + 4. Other sectors can be slightly longer (some codes are two letters, some numbers carry bracketed sub-indices).

The pattern, with placeholders:

[Sector][Year][Type][Number]
   3     2014    L    0053

Sector codes

The first character is the sector. EUR-Lex assigns each kind of document to a sector:

Source: EUR-Lex — CELEX number help.

For CE-marking work you will mostly live in sector 3 (the legislation itself), sector 0 (the up-to-date consolidated text you actually want to read), and occasionally sector 5 (when you need to read a Commission proposal or impact assessment).

Document type codes (sector 3)

Inside sector 3, a single letter tells you the instrument type:

So you can read at a glance: 32016R0679 is a regulation (GDPR), 32014L0053 is a directive (RED), and the rest of the format is just date and counter.

Sector 5 uses two-letter codes — PC (Commission legislative proposal), DC (other COM document), SC (staff working document, SWD), JC (JOIN document).

Worked example: 32014L0053 = RED

Decoding character by character:

• 3 — sector: legal acts of the EU
• 2014 — year of adoption: 2014
• L — document type: directive
• 0053 — sequential number: 53

Reassembled: Directive 2014/53/EU. Confirming on EUR-Lex, this resolves to "Directive 2014/53/EU of the European Parliament and of the Council of 16 April 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and repealing Directive 1999/5/EC" — the Radio Equipment Directive, published in OJ L 153, 22 May 2014, p. 62.

The canonical EUR-Lex URL pattern is:

https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32014L0053

Swap the CELEX at the end for any other and EUR-Lex resolves it.

Consolidated text identifiers (sector 0)

Per EUR-Lex, "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."

So:

• 32014L0053 — the RED as originally adopted in 2014
• 02014L0053-YYYYMMDD — the consolidated version of the RED incorporating all amendments in force as of YYYYMMDD

The suffix is the date the latest incorporated amendment applies from, not the date the consolidation was produced. When you cite a regulation in a Declaration of Conformity you should be referring to the basic act (sector 3), but when you read the text to check your obligations you should open the most recent consolidated version (sector 0) so you do not miss amendments. See also Updating a DoC after amendment for the procedural follow-up.

More worked examples

You can verify any of these by pasting them into https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:<celex>.

Common mistakes

• Confusing the CELEX with the OJ reference. A CELEX (32014L0053) identifies the legal act; the OJ citation (OJ L 153, 22.5.2014, p. 62) identifies where it was published. Both point at the same act but they are different identifiers.
• Reading the year as two digits. CELEX years are always four digits. 32014L0053 is 2014, not 1914 or "the 32014th something".
• Citing a consolidated text as the basic act. If you write "see 02014L0053-20180101" in a Declaration of Conformity, you are citing a specific snapshot of the consolidated text. Use the sector-3 identifier (32014L0053) for the act itself and only use sector-0 identifiers when you specifically need to point at a consolidation date.
• Assuming the sequential number matches the published number. They usually do — 32014L0053 is Directive 2014/53/EU — but EUR-Lex notes that some numbers reflect internal author numbers (especially in sector 5) rather than the official OJ number.
• Ignoring the consolidated version. Always open the consolidated text to read current obligations. The original sector-3 act may have been amended five times since adoption.

How Cenitia helps

Cenitia maintains a live mapping between CELEX identifiers, the consolidated versions in force, and the obligations they place on your product. When the regulation watcher detects a new amendment, the consolidated CELEX date changes — and Cenitia flags every Declaration of Conformity and Technical File entry that cites the affected act, so you know exactly what to re-review.

In practice that means your Technical File carries the basic-act CELEX (stable forever), and Cenitia silently tracks the consolidated CELEX in the background so you read the current text without having to remember to refresh.

Frequently asked questions

What does the 3 in 32014L0053 mean?

Sector 3 = Legal acts of the European Union (regulations, directives, decisions). EUR-Lex documents the sector taxonomy on its CELEX help page at eur-lex.europa.eu/content/help/eurlex-content/celex-number.html.

What is the difference between L, R, and D in a CELEX number?

Within sector 3, L = directive, R = regulation, D = decision. So 32016R0679 is Regulation (EU) 2016/679 (GDPR), 32014L0053 is Directive 2014/53/EU (RED), and 32013D0490 is a decision adopted in 2013.

Why does the CELEX for a consolidated version start with 0?

Sector 0 is reserved for consolidated texts on EUR-Lex. The CELEX keeps the original year and number of the basic act but prefixes 0 and appends the date the latest incorporated amendment applies from, e.g., 02014L0053-20180101.

How do I open a CELEX directly on EUR-Lex?

Use the canonical URL pattern https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:<celex>. EUR-Lex resolves the identifier and lets you switch language versions, view amendments, and jump to the consolidated text.

Are CELEX numbers stable when a regulation is amended?

Yes for the original act — 32014L0053 always points to Directive 2014/53/EU as adopted. Amendments get their own CELEX (each is a separate legal act). Consolidated texts use the 0-prefixed sector with a date suffix that changes each time a new amendment is incorporated.

What sector covers Commission proposals?

Sector 5 (preparatory documents). Codes inside sector 5 include PC for Commission legislative proposals, DC for other COM documents, SC for SWD (staff working documents), and JC for JOIN documents.

Related from the Library

• Declaration of Conformity 101 — where CELEX-cited regulations appear on every DoC
• Updating a DoC after amendment — what happens when a consolidated CELEX date moves
• Sample DoC walkthrough — annotated DoC with CELEX-style references
• Technical File 101 — citing harmonised standards and base acts inside the file
• RED delegated act and EN 18031 walkthrough — worked example using RED (32014L0053) and its delegated act

Further reading

• EUR-Lex — CELEX number — canonical format reference
• EUR-Lex — Document search help — building queries with CELEX, ELI, OJ references
• Directive 2014/53/EU on EUR-Lex — RED, the worked example
• Regulation (EU) 2016/679 on EUR-Lex — GDPR
• EUR-Lex — About consolidated texts — how consolidations are produced and dated
• Publications Office — Interinstitutional Style Guide — controlled vocabularies behind EUR-Lex metadata
• ELI register — the European Legislation Identifier, the URL-friendly companion to CELEX

Last reviewed: 5 July 2026. Cited regulations watched continuously by Cenitia — when one amends, this article is flagged for update.