I just got an email from LEAF (Women's Legal Education and Action Fund), about their upcoming intervention at the Supreme Court of Canada re: the discriminatory effect of the Québec law that restricts the wearing of religious symbols in certain professions.

"This case is about discrimination against women who wear religious symbols.

...

For example, women who wear hijabs can no longer be hired as teachers. Women who wear niqabs are prohibited from working in most parts of public administration. Further, women who wear niqabs cannot benefit from public services because the law requires that individuals who wish to receive public services must do so with their faces uncovered.

The government, well aware that its law infringes equality rights, freedom of expression, and freedom of religion, pre-emptively used the notwithstanding clause to prevent any constitutional challenges."

https://www.leaf.ca/case_summary/hak-v-attorney-general-of-quebec/