In an election petition alleging corrupt practices under the Electoral Act, the petitioner must prove beyond reasonable doubt that an offence defined in Part XX of the Act was committed. The offence of 'undue influence' under section 105, while broadly covering various forms of force, violence and threats, is narrowly confined in its application: it requires proof that the prohibited conduct was directed at a particular identifiable person (not the general populace) with the specific intention of compelling or inducing that person to sign/refrain from signing nomination papers, to vote/refrain from voting, or was on account of that person having done so. Random acts of political violence and general intimidation, though unlawful, do not constitute undue influence under section 105 unless this specific nexus between the act and the electoral purpose is established beyond reasonable doubt.