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The Blue Guide, explained

Last reviewed: August 2026 · Legal status verified against EUR-Lex.

The Blue Guide is the European Commission's manual on how EU product rules work. Its current edition is Commission Notice C/2022/3637, published in the Official Journal as OJ C 247 of 29 June 2022. It is not legislation and binds no one — yet it is the single most-cited document in CE marking practice. Market surveillance authorities, Notified Bodies, customs officials, and compliance professionals across the EEA use it as their common interpretation of the New Legislative Framework, and much of what practitioners treat as settled doctrine on questions the legislation leaves open — when exactly a product is "placed on the market", when a modification creates a new product, how online sales are treated — comes from its pages.

What the Blue Guide is

The document descends from the Commission's 2000 "Guide to the implementation of directives based on the New Approach and the Global Approach". Rewritten editions appeared in 2014 and 2016 under the Blue Guide name, and the 2022 edition updated the text for Regulation (EU) 2019/1020 on market surveillance, the growth of e-commerce, and the shift from directives to regulations. It runs to well over a hundred pages and covers the whole life of a harmonised product: scope questions, economic operator roles, conformity assessment, harmonised standards, accreditation, Notified Bodies, market surveillance, and the free movement of compliant goods.

Formally it is a Commission notice — an instrument of soft law. The Guide itself states that it is intended purely as guidance, that only the text of Union harmonisation legislation has legal force, and that authentic interpretation of EU law is the exclusive prerogative of the Court of Justice of the European Union.

Placing on the market vs making available

The Guide's most consequential contribution is its detailed treatment of the two concepts on which the whole system pivots.

Three consequences follow, all developed at length in the Guide:

  1. The concept applies to each individual product, not to a model or type. Every unit is placed on the market once. A model launched in 2020 continues generating new "placings" for as long as new units are supplied — which determines which version of the law applies to each unit when requirements change, a live question during transitions such as those tracked in 2025–2026 changes.
  2. Placing on the market requires an offer or agreement plus a product that exists and has completed its manufacturing phase. Transfer of ownership or physical handover to the distributor, importer, or end user in the EU completes the operation; products in a manufacturer's warehouse outside the EU are not yet placed on the market.
  3. Compliance is assessed against the requirements in force at the moment of placing on the market. Products lawfully placed on the market before a new act applies may generally continue to circulate — they have already been "placed" — unless the new act says otherwise.

Putting into service

Some acts — the Machinery Regulation, the Lifts Directive, the ATEX Directive, the Medical Devices Regulation among them — attach obligations not only to placing on the market but also to putting into service: the first use of the product in the EU for its intended purpose. The Guide explains why this matters: it catches products that are never "placed on the market" at all, such as machinery a company builds for its own use, or equipment imported by an end user directly. For such products, the person putting them into service must ensure they comply, even though no commercial supply occurred.

Substantial modification: when a product becomes new

The Guide sets out the doctrine that a product which has been substantially modified after being placed on the market may have to be treated as a new product — triggering a fresh conformity assessment, new technical documentation, a new Declaration of Conformity, and responsibility for the person who carried out the modification, who is then treated as manufacturer. The Guide's test asks whether the modification:

Ordinary maintenance, repair with equivalent parts, and software updates that stay within the assessed design do not create a new product. The line matters commercially for refurbishers, system integrators, and importers who adapt goods for the EU market — and the Machinery Regulation (EU) 2023/1230 has now written a definition of substantial modification directly into binding law, following the Guide's approach.

Distance and online sales

The Guide confirms the rule now anchored in Article 6 of Regulation (EU) 2019/1020: a product offered for sale online or by other distance means is deemed made available on the EU market if the offer is targeted at end users in the Union. Whether an offer targets EU customers is assessed case by case from factors such as the geographic areas served, the languages and currencies used, and EU delivery options. The practical effect is that a seller with no EU establishment shipping direct-to-consumer parcels is within the system, not outside it — the analysis developed further in CE marking for e-commerce and importing from non-EU countries.

Connected to this, the Guide describes the role of fulfilment service providers — businesses warehousing, packing, and dispatching goods they do not own. Under Regulation 2019/1020, a fulfilment service provider in the EU can be the responsible economic operator for a product when no manufacturer, importer, or authorised representative is established in the Union.

Other doctrines practitioners take from the Guide

Spare parts and components

The Guide distinguishes products placed on the market as such from parts supplied for repair. A spare part supplied to replace a defective part of a product already in service is generally not treated as triggering fresh conformity of the whole product — though the part itself may fall within scope of an act in its own right (electronic components under RoHS, for example), and parts that upgrade rather than restore a product can amount to substantial modification.

Software

The Guide addresses software as part of a product: software that determines or affects a product's compliance falls within the conformity assessment, and updates that change the product beyond its assessed state can amount to modification. Sectoral acts have since taken this further — the Radio Equipment Directive for cybersecurity, the Machinery Regulation for safety software, the MDR for software that is itself a device — and the AI Act now layers its own requirements on top for AI systems.

Economic operator roles

Chapter 3 of the Guide is the standard commentary on who counts as manufacturer, importer, distributor, and authorised representative — including the own-brand rule under which an importer or distributor marketing a product under its own name assumes the manufacturer's obligations, and the position of private-label arrangements, licensing, and subcontracted manufacture.

Legal status: authoritative, not binding

The Guide's authority in practice rests on three things: it is written by the Commission services that draft and manage the underlying legislation; it is applied EEA-wide, giving authorities a shared baseline; and no comparably comprehensive alternative exists. National courts and market surveillance authorities cite it routinely when construing terms such as "placing on the market".

Its limits are equally real:

How to use it. Treat the Blue Guide as the default answer to any structural question the legislation leaves open, and expect authorities to do the same — but verify against the current text of the applicable act, since the law has moved since 2022 on several fronts.

Sources

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