260 Matters excluded from challenge

On the hearing of a petition presented pursuant to section 258, no decision shall be subject to challenge on the grounds—


that the vote of any elector should have been disallowed because he or she was not qualified to vote in the electoral district in respect of which he or she cast his or her vote; or


that the vote of any voter that was disallowed should have been allowed; or


that a candidate or candidates, or the agent of any candidate, was engaged in a corrupt or illegal practice; or


that corrupt or illegal practices prevailed at the election.