If a person acts in contravention of a disqualification order or disqualification undertaking or in contravention of section 12(2), 12A or 12B, or is guilty of an offence under section 11 or 11A, he is liable -

(a) on conviction on indictment, to imprisonment for not more than 2 years or a fine, or both; and

(b) on summary conviction, to imprisonment for not more than 6 months or a fine not exceeding the statutory maximum, or both.