New tools are being given to law enforcement across Canada in their fight against impaired driving but there are many that say the rules go too far.

The federal government's Bill C-46 comes into effect Tuesday and will affect the ability of police services to detect and enforce alcohol- and drug-impaired driving. Police offers will no longer need to have a specific reason for demanding a roadside breath sample from drivers they pull over. They simply need a legal reason to stop that vehicle and can proceed from there.

Lawmakers are championing the changes as a way to detect drivers who feel it's acceptable to have a couple of drinks and still get behind the wheel. Opponents suggest the new rules go too far and many expect the changes will be challenged before the courts very quickly.