1. If a person who contravenes the provisions of articles 410, 411, 412, 414 and 414-2 of this Code commits, within five years of a settlement or conviction that has become final, a new offence falling within the scope of the penalties provided for by the aforementioned articles, the maximum rate of penalties incurred shall be doubled. 2. This provision shall not apply, except in the case of personal fault, to persons whose profession is to carry out customs formalities on behalf of others.