Any person violating any one or more of the provisions of this article is guilty of a misdemeanor and, upon conviction, shall be fined for the first offense not less than twenty-five dollars, nor more than one hundred dollars, or be imprisoned for not more than thirty days; for the second offense, not less than fifty dollars, nor more than one hundred dollars, or be imprisoned for not more than thirty days; for the third offense, not less than one hundred dollars or be imprisoned for not more than sixty days; and for each subsequent offense the fine or imprisonment imposed for the last previous offense shall be doubled. Each violation of any provision of this article shall constitute a separate offense.