(a) A Professional Geoscientist or a Geoscience Firm shall undertake to perform a professional service only when the Professional Geoscientist or Geoscience Firm, together with those whom the Professional Geoscientist or Geoscience Firm shall engage as consultants, are qualified by education and/or experience in the specific technical areas involved. During delivery of a professional service, a Professional Geoscientist or Geoscience Firm shall act with reasonable care and competence and shall apply the technical knowledge and skill, which is ordinarily applied by reasonably prudent Professional Geoscientists practicing under similar circumstances and conditions.(b) A Professional Geoscientist shall not affix his/her signature or seal to any document dealing with subject matter in which he/she is not qualified by education and/or experience to form a reasonable judgment.(c) A Professional Geoscientist or a Geoscience Firm shall not engage in conduct or perform professional geoscience services characterized by Gross Incompetence including work that evidenced an inability or lack of skill or knowledge necessary to discharge the duty and responsibility required of a Professional Geoscientist or Geoscience Firm; or evidenced an extreme lack of knowledge of, or an inability or unwillingness to apply, the principles or skills generally expected of a reasonably prudent Professional Geoscientist or Geoscience Firm.(d) A Professional Geoscientist who has been adjudicated mentally incompetent by a court may not renew a license or engage in activities requiring a license under the Act.