Any person, firm, corporation, association, or co-operative violating any of the provisions of this article or any of the rules and regulations promulgated hereunder shall be guilty of a misdemeanor and, upon conviction, shall be punished by a fine of not more than one hundred dollars ($100.00), or by imprisonment of not more than three (3) months, or by both such fine and imprisonment. If the commissioner of agriculture and commerce shall find, upon examination or test, that any person, firm or corporation has violated any of the provisions of this article or rules or regulations hereunder, he or his duly authorized agent or agents may institute proceedings in a court of competent jurisdiction to have such person, firm, corporation, association, or co-operative convicted therefor, or the said commissioner may, in his discretion, report the results of such inspection to the district attorney or county attorney having jurisdiction, together with such other evidence of said violation as he shall deem necessary, and any certificate of such inspection or test, properly certified by affidavit shall be competent evidence in any court of this state. It shall be the duty of said district attorney or county prosecuting attorney to institute proceedings at once against the person, or persons, firms, corporations, associations, or co-operatives charged with such violations.