Many members of the Law Society of Upper Canada's board of directors condemned the policy as "abhorrent," though several said they would still vote in favour of allowing graduates to practise in Ontario. Ultimately there were 28 votes against accreditation to 21 in favour.
Trinity Western University, which plans to open a law school in the fall of 2016, requires students to abide by a covenant that includes requiring them to abstain from gossip, obscene language, prejudice, harassment, lying, cheating, stealing, pornography, drunkenness and sexual intimacy "that violates the sacredness of marriage between a man and a woman."
Students can face discipline for violating the covenant, either on or off campus, according to the school's student handbook.
University president Bob Kuhn appealed to the Law Society of Upper Canada to avoid penalizing his students for their beliefs as it would signal to millions of Canadians with religious views that they are "not welcome in the public marketplace," he said.
"This is not an issue of discrimination against anyone except those students who may, five years from now, apply to practise law in Ontario," he said.
"The irony of the situation is that the assault on this small Christian community is being led by a powerful moral majority who seek to impose their views and enforce conformity and compliance on TWU as a price for entering the public arena."
Trinity Western says it will be the first Christian university in Canada to open a law school. It plans to enrol 60 students in the first year of the three-year program.
The law school has received preliminary approval from the Federation of Law Societies of Canada and earlier this month the Law Society of B.C.'s board voted to allow the school to proceed.
But a lawyer from Victoria, B.C., has submitted a petition with 1,177 signatures requesting that the B.C. law society convene a special meeting to reconsider its approval.
Any resolution passed at that meeting would not be binding, but the law society has a process to call a general referendum on it if enough members make the request.
The majority of lawyers who made submissions to Ontario's law society Thursday stood firmly against accrediting the university. Lawyer John Campion dismissed Kuhn's pitch that the issue is one of freedom of religion.
Anyone is free to go to the school, he said, but its policies are discriminatory and contrary to public policy in Ontario, where gay marriage is embraced and common-law relationships are recognized.
"I don't think we should take even a millimetre step backwards," Campion said. "We can't do it. All that work and all that trouble and all that pain and we're going to take one little step backwards? I say no."
Lawyer Howard Goldblatt said the law society promotes and protects equity and diversity, which is in the public interest.
"I cannot vote to accredit a law school which seeks to control students in their bedrooms, which threatens to punish those who want to be free to be themselves and to engage in loving and meaningful relationships but who must sign what I consider to be an offensive and morally diminishing agreement," he said.
Lawyer Peter Wardle, said his decision to vote against accreditation was a difficult one as a practising Catholic, but the law society "can't turn a blind eye to the discriminatory aspects" of Trinity Western's policy.
"This is not about TWU's religious or private status as an institution," Wardle said. "This is about TWU seeking the right to have us accredit their law school and we are a public institution."
Lawyer Christopher Bredt, who voted for the school's accreditation, said the Trinity Western covenant conflicts with his personal views, but the decision must be based on the law.
If the university is not accredited, Trinity Western law graduates who wanted to practise in Ontario would have to go through a national committee on accreditation, which looks only at whether curriculum requirements are met, Bredt said.
"There's no suggestion that the curriculum of the law school would not otherwise meet our standards," he said. "There is no suggestion that the graduates of TWU are any more likely to discriminate than graduates of any other Canadian law school."
That approach would create two tiers for licensing lawyers in Ontario — one for those who attend a faith-based school and another for those who attend secular schools, he said, and the Supreme Court of Canada has said burdens should not be imposed on people because of their religious beliefs.
Kuhn touted his graduates' achievements and said they are particularly engaged members of the community. Prospective students aren't asked about their sexual orientation during the application process, he said, though indeed there are gay and lesbian students at the school.
Everyone is welcome, he said, as long as they agree to abide by the community covenant.
"It's not a university of bigotry or a university of intolerance," he said. "It's a university the students leave saying, 'I love this place.'"