(a) In its investigations under this chapter, the department may administer oaths or affirmations and, on its own motion or on the request of a party to a proceeding, may subpoena witnesses, compel the attendance of witnesses, take evidence, and require the production of material that is relevant to the investigation, including the existence, description, nature, custody, condition, and location of books, documents, and other tangible items, and the identity and location of persons having knowledge of relevant facts or other material reasonably calculated to lead to the discovery of admissible evidence.
(b) If a person fails without a lawful excuse to obey a subpoena, and after reasonable notice to all persons affected by the failure, the department may apply to the superior court for an order compelling the person to obey the subpoena.