The Municipal Elections Act, 1996, sets out the rules for third party advertising:
- A third party advertisement is an advertisement in any broadcast, print, electronic or other medium that has the purpose of promoting, supporting or opposing a candidate running in the election, or a "yes" or "no" answer to a question on the ballot;
- Individuals, corporations and trade unions who wish to conduct third party advertising in the City of Thorold Municipal Election must be registered with the City Clerk;
- A third party advertiser cannot spend money on their campaign, accept contributions or begin advertising until their registration is certified by the City Clerk
- Advertisements must identify the name of the registered third party advertiser, the municipality where they are registered and contact information.
- Candidates cannot register as a third party advertiser and cannot direct a third party advertiser.