Before any violation of this article is reported by the department for institution of a criminal proceeding, the person against whom such proceeding is contemplated shall be given reasonable notice of the alleged violation and opportunity to present his views orally or in writing with regard to such contemplated proceeding. Nothing in this article shall be construed as requiring the department to report for criminal prosecution minor violations of this article if it believes that the public interest will be adequately served and compliance obtained by a suitable written notice or warning.