If it shall appear from the examination of any commercial fertilizer or soil conditioner that any of the provisions of the Nebraska Commercial Fertilizer and Soil Conditioner Act or the rules and regulations issued thereunder have been violated, the director shall cause notice of the violations to be given to the person from whom the sample was taken. Any person so notified shall be given opportunity to be heard under such rules and regulations as may be prescribed by the director. If it appears after such hearing, either in the presence or absence of the person so notified, that any of the provisions of the act or rules and regulations issued thereunder have been violated, the director may certify the facts to the county attorney of the county in which the violation occurred or to the Attorney General, as the case may be.