http://www.motorauthority.com/news/1073607_france-decrees-mandatory-breathalyzers-in-all-cars-by-july-1
"It's also important to note that while immobilizers tied into the breathalyzer system (often called alcolocks in Europe) are compliant with the law, they're not required. A driver in compliance with the law could have a breathalyzer, use it, and still drive away drunk if they choose to. And of course, the classic alcolock loophole of having another, sober person blow into the unit still exists." ???