When a partner retires from a licensed partnership or a new partner is admitted, or when a person ceases to be an officer, director, or 10% stockholder of a licensed corporation or a person becomes an officer, director or 10% stockholder of a licensed corporation, the Commissioner shall, within ten (10) days after the event, be advised of the facts in detail by letter. The letter shall be accompanied by a duly completed Biographical Questionnaire (on Form No. PF-3) of any new partner or any new officer, director or 10% stockholder. Each licensee shall supply such additional information as the Commissioner may request.
18 Del. Admin. Code § 2001-5.0