Motorists travelling to France after June 30 are warned that not only must they have a breathalyser in their car, but it also must be one certified to a French standard, NF.
The regulation is aimed at cutting down on drink driving in France, where the limit is 50mg/100ml of blood.
The NF is a circular blue logo, and if you're stopped without a suitably certified one-use breathalyser, the gendarmes are likely to treat you as if you haven't one and fine you.
They don't take prisoners, just your credit card.
