A third party advertisement is an advertisement in any broadcast, print, electronic, or other medium that promotes, supports, or opposes a candidate in an election, or that advocates for or against a “yes” or “no” response to a question on the ballot.
Ontario residents, corporations, and trade unions that intend to incur expenses for third party advertising are required to register with the Clerk as a third party advertiser prior to commencing any advertising activities.
Registration for third party advertisers: will open at 9:00 a.m. on Friday, May 1, 2026, and will close at 4:30 p.m. on Friday, October 23, 2026.