Lawyers representing the attorneys general of Canada and several provinces asked the Supreme Court of Canada on Tuesday to uphold a Quebec law allowing police to make routine traffic stops without cause, while civil rights groups insist such stops lead to racial profiling.

The country’s top court spent a second morning hearing arguments about whether it’s constitutional for police to make traffic stops without reasonable suspicion the driver has committed an offence.

The case involves Joseph-Christopher Luamba, a Black Montrealer in his 20s who said he was repeatedly stopped by police for no apparent reason when he was driving or riding in cars.