Section 42. The director in proceedings based upon an election petition, as provided in section thirty-three, and the clerk of the court wherein a person is convicted of a violation of any provision of law relating to corrupt practices in elections, shall, within ten days after final judgment on such election petition or conviction, forward to the clerk of the city or town where the defendant resides a certified copy of the record of the final judgment or conviction, and the name of such person shall forthwith be stricken from the roll of registered voters of the city or town for a period of three years.