AETR Rules Explained: The Other Drivers' Hours Regime for International Journeys

Every UK driver running internationally works under one of two regimes: the assimilated EU drivers’ hours rules, or the AETR. Most of the time they look identical, which breeds a dangerous assumption that they are the same thing. They are not, and the differences are growing.

What the AETR is

AETR stands for the European Agreement Concerning the Work of Crews of Vehicles Engaged in International Road Transport. It is a treaty-based set of drivers’ hours and tachograph rules, older than the EU regulation, designed so that a driver on an international journey follows one coherent rulebook across every country the journey touches, including countries outside the EU.

DVSA’s guidance is explicit that both regimes survived Brexit: the assimilated rules, meaning Regulation (EC) 561/2006 and Regulation (EU) 165/2014 as they have effect in the UK, and the AETR rules continue to apply as before, even though the UK has left the EU. The UK remains a party to the AETR in its own right.

When AETR rules apply

The dividing line is the journey, not the driver or the vehicle:

• Journeys wholly within the UK, or between the UK and EU member states, run under the assimilated rules.
• International journeys to, from or through AETR signatory countries outside the EU run under the AETR rules for the whole journey.

The AETR signatories include most of Europe’s non-EU states, so a run to Turkey, Ukraine or the Balkans is an AETR journey from the moment it starts, including its UK and EU legs. One rulebook per journey is the whole point: you do not switch regimes at each border. It also means the driver cannot cherry-pick the more favourable regime for individual legs; the classification set at the start of the journey governs all of it.

The core numbers drivers know from the assimilated rules, daily driving limits, breaks, daily and weekly rest, carry across in near-identical form, because the AETR was deliberately aligned with the EU regulation. The tachograph duties travel too: vehicles in scope must have a tachograph fitted and drivers must use it to record driving, breaks, rest, other work and periods of availability, whether the journey is assimilated or AETR.

Where the two regimes now diverge

Here is the trap: alignment is maintained by agreement, and the AETR Agreement has not yet been aligned with the latest version of Regulation (EC) 561/2006. DVSA’s guidance flags several consequences:

• The light goods vehicle exemption. From 1 July 2026, assimilated rules apply to light goods vehicles over 2.5 tonnes on international transport operations, including cabotage, within the UK and EU. This does not apply to AETR-regulated journeys, and the related international carriage exemption for light goods vehicles does not apply to AETR journeys either, because the AETR Agreement has not been aligned.
• The craft goods exemption. The exemption for delivering hand-crafted goods does not apply to AETR-regulated journeys, for the same alignment reason.
• Certain rest provisions. Some sections of the current assimilated rest guidance do not apply to AETR-regulated journeys, again pending alignment. Where drivers work under a combination of both regimes, the four-week arithmetic still applies: within any four-week period, two of the weekly rest periods must be regular weekly rests, with compensation rules observed.
• Concessions. The reserve forces concession from daily and weekly rest requirements applies under the assimilated rules but not under AETR rules.

The pattern to remember: exemptions and modernisations introduced into the assimilated rules do not automatically exist on AETR journeys. Check each one before relying on it internationally.

What this means for operators

• Classify the journey before it starts. A booking to an AETR country is an AETR job end to end, and the driver’s planning, breaks and rest should be scheduled against that from day one.
• Do not port exemptions across. An exemption that protects the job in France may not exist beyond the EU frontier. If the schedule depends on an exemption, verify it applies to AETR-regulated journeys.
• Brief drivers on the difference. Drivers who only ever run EU work can go years without thinking about the AETR; their first Balkan job is not the moment for a briefing in the comments section of a ferry queue.
• Keep the records. The tachograph records the whole journey regardless of regime, and enforcement in AETR countries expects the same discipline as DVSA does at home.

The AETR is the quiet sibling of the drivers’ hours family: same surname, same manners, slightly different rules, and no patience for people who cannot tell them apart.

Sources

• Drivers’ hours and tachographs: goods vehicles, assimilated and AETR rules (GOV.UK)
• Drivers’ hours and tachographs: goods vehicles (GOV.UK)