The measure, part of a law passed by the National Assembly of Quebec in October, bans women from wearing face coverings when using public services such as buses or libraries. Provincial lawmakers say the law is meant to ensure public security and is among the first of its kind in North America.
The law, known as Bill 62, is creating a thorny challenge for the Liberal government of Prime Minister Justin Trudeau, which will decide by the end of this month whether or not to join the lawsuit challenging the niqab ban or take other official measures to oppose it.
Mr. Trudeau, who has championed both Canadian immigration and women’s rights, has said he didn’t agree with the law, but when it passed, he expressed a reluctance—common among Canadian prime ministers—to wade into Quebec’s provincial politics. “It isn’t up to the federal government to challenge this,” he said.