The charges stem from an OPP investigation into allegations surrounding London's 2018 municipal election.

On Tuesday Kim Poffenroth tabled a discussion document before members of the province's standing committee on procedure, privileges and legislative officers.

Tierney was re-elected as councillor for Beacon Hill-Cyrville on Oct. 22. He won more than 80 per cent of the vote.

Police said in a media release that both were charged following an investigation into "irregularities" under the Municipal Elections Act.

Caledon voters were able to cast their ballots today as early voting began, but one candidate running for a regional council position is accusing the incumbent of breaking election laws.

Changes to the Municipal Elections Act will require candidates in the 2018 Peterborough election to comply with a new set of campaign finance rules.

The provincial government tabled legislation last month that would see the number of city council seats reduced by nearly half in the October municipal election.

After coming under fire over advertisements that some believe violate the Municipal Elections Act, two potential mayoral candidates are defending themselves.