Conn. Gen. Stat. § 16a-22g: Penalty for failure to register.

Any person who fails to register by September thirtieth in each year in accordance with section 16a-22d shall be deemed to have committed an infraction and be fined not less than seventy dollars, except that any person who registers within thirty days thereof shall not be deemed to have committed an infraction if a late filing fee of fifty dollars is included with such person's registration form.