The rights of people who live with a disability to be accommodated with their service animal falls under both the Ontario Human Rights Code and the AODA the Accessibility for Ontarians with Disabilities Act.

Specifically, in the human rights code: The duty to accommodate may require waiving or changing a rule (for example, allowing guide dogs or other service animals in a building with a “no pets” policy.)

Read more at
http://www.aoda.ca/n-im-not-here-the-dog-is-her-comfort/