12. Any person who hinders or attempts to hinder in any manner a person doing anything that he is obliged or authorized by this act to do, knowingly gives him incorrect information, misleads him by a false declaration or refuses to give him any information which he is entitled to obtain under this act, is guilty of an offence and liable, upon summary proceeding, in addition to the payment of the costs, to a fine of not more than one hundred dollars for the first offence and, for any subsequent offence within twelve months, to a fine of not more than two hundred dollars.