According to Le Monde, starting on 1st of July, all cars registered before 1997 and motorcycles registered before 2000 will be banned from the city center during weekdays. It reports that up to 10 percent of the vehicle population will be affected by the ban.
To differentiate each vehicle's pollution status, every vehicle will have a colour coded sticker that separates them into six categories.
The embargo will get more stringent as time go by. From 2020 onward, only cars registered after 2011 will be allowed on the road.