The opinion of islamic experts, or islamic schools of thought isn't required under Canadian law.

Most of us remember the legal case about whether a sexual assault complainant could testify while wearing her niqab (bottom line: she couldn't). It went through 3 levels of court, including the Supreme Court of Canada. Wearing the niqab was held to be part of her religious beliefs. 

That's because in Canadian law: 

"[T]he freedom to undertake practices and harbour beliefs, having a nexus with religion, in which an individual demonstrates he or she sincerely believes or is sincerely undertaking in order to connect with the divine or as a function of his or her spiritual faith, ** irrespective of whether a particular practice or belief is required by official religious dogma or is in conformity with the position of religious officials. **" 
~ Syndicat Northcrest v. Amselem [2004, SCC]