The Freight Transport Association has warned operators that from 1 July anyone driving a motorised vehicle in or through France will be required to carry a single-use disposable breathalyser kit.
The aim to reduce drink-driving problems in the country, which were responsible for around 4,000 deaths in 2011, by enabling drivers to test themselves before beginning their journey.
Enforcement and fines for not carrying one will not commence until 1 November.
The FTA is selling suitable breathalysers.
FTA understands that the police will use their own, more sophisticated alcohol testing devices if a driver is suspected of being over the drink-drive limit and is asked to take a test.