OTTAWA - The Bloc Quebecois is taking its defence of the provincial government's secularism bill to English Canada with a billboard along an Ottawa highway.

The message in English reads, "Quebec knows what's right for Quebec. Thank you."

Bloc Quebecois leader Yves-Francois Blanchet said the move is in anticipation of what he expects will be federal involvement in an eventual challenge of Quebec's Bill 21.

Prime Minister Justin Trudeau has spoken out against the bill, which would prohibit public sector workers in positions of authority, including teachers, from wearing religious symbols.

At a press conference in Ottawa this morning, Blanchet called on Trudeau to confirm that Ottawa will not spend a cent supporting a court challenge of the law.

He said the debate concerns Quebec only, and Trudeau should not get involved.