Solemnization of marriage by religious officials
From: Guide to your rights and responsibilities under the Human Rights Code
There is an exception to the rule that services and facilities must be offered without discrimination. It allows a religious official to refuse to perform a marriage ceremony, to refuse to make available a sacred place for performing a marriage ceremony or for an event related to a marriage ceremony, or to assist in the marriage ceremony where the ceremony would be against the person’s religious beliefs or the principles of their religion.