156 opitz v. wrzesnewskyj [2012] 3 S.C.R. where they are established, shall declare the election null and void or may annul the election, respectively. constater la nullité de l’élection du candidat ou il peut prononcer son annulation. Appeal allowed and cross-appeal dismissed, McLachlin C.J. and LeBel and Fish JJ. dissenting. Pourvoi accueilli et pourvoi incident rejeté, la juge en chef McLachlin et les juges LeBel et Fish sont dissidents.  Solicitors for the appellant/respondent Ted Opitz: Fasken Martineau DuMoulin, Toronto; Davies Ward Phillips & Vineberg, Toronto. Procureurs de l’appelant/intimé Ted Opitz : Fasken Martineau DuMoulin, Toronto; Davies Ward Phillips & Vineberg, Toronto. Solicitors for the respondent/appellant Borys Wrzesnewskyj: Gardiner, Roberts, Toronto; Gowlings, Ottawa. Procureurs de l’intimé/appelant Borys Wrzesnewskyj : Gardiner, Roberts, Toronto; Gowlings, Ottawa. Solicitors for the respondents Marc Mayrand (Chief Electoral Officer) and Allan Sperling (Returning Officer, Etobicoke Centre): Borden Ladner Gervais, Toronto; Elections Canada, Ottawa. Procureurs des intimés Marc Mayrand (directeur général des élections) et Allan Sperling (directeur de scrutin, Etobicoke-Centre) : Borden Ladner Gervais, Toronto; Élections Canada, Ottawa. Sarah Thompson, on her own behalf. Sarah Thompson, pour son propre compte. Solicitors for the intervener Keith Archer (Chief Electoral Officer of British Columbia): Waddell, Raponi, Victoria; Turnham Woodland, Victoria. Procureurs de l’intervenant Keith Archer (Chief Electoral Officer of British Columbia) : Waddell, Raponi, Victoria; Turnham Woodland, Victoria. Solicitors for the intervener O. Brian Fjeldheim (Chief Electoral Officer of Alberta): Shores Jardine, Edmonton. Procureurs de l’intervenant O. Brian Fjeldheim (Chief Electoral Officer of Alberta) : Shores Jardine, Edmonton. Solicitors for the intervener the Canadian Civil Liberties Association: Koch Thornton, Toronto. Procureurs de l’intervenante l’Association canadienne des libertés civiles : Koch Thornton, Toronto.

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