Upon the issuance of such license, the Board of Health shall furnish the licensee with a plate, badge or other evidence bearing a number corresponding to the number of the license and the year in which it was granted. The plate, badge or other evidence shall be displayed at all times in a conspicuous part of the vehicle used by the licensee, if any, in the conducting of his business, and if no vehicle shall be used, it shall be carried by him and exhibited on demand of any of the citizens of the Borough or members of the Police Department thereof. Such license shall be good only for the year in which it was issued, and shall expire at 12:00 midnight, December 31, of each year. Any licensee applying for or obtaining a license after the first day of January in any year shall pay the license fee for the full year for which it was issued, and each license shall expire at 12:00 midnight, December 31, of each year.