It shall be the duty of each district attorney to whom the State Commissioner of Health reports any violation of this article to cause appropriate proceedings to be instituted in the proper courts without delay and to be prosecuted in the manner required by law. Before any violation of this article is reported to any district attorney for the institution of a criminal proceeding, the person against whom such proceeding is contemplated shall be given appropriate notice and an opportunity to present his views before the Commissioner or his designated agent, either orally or in writing, in person, or by attorney, with regard to such contemplated proceeding.