For the purpose of any investigation or proceeding under the provisions of this chapter, the board or any person designated by it may administer oaths and affirmations, subpoena witnesses, take evidence, and require the production of any documents or records which the board considers relevant to the inquiry. In the case of contumacy by, or refusal to obey a subpoena issue to, any person, an administrative law judge as provided under Article 5 of Chapter 23 of Title 1, upon application of the board, may issue an order requiring the person to appear before the board or the person designated by it and produce documentary evidence and to give other evidence concerning the matter under inquiry. Whenever the board has reason to believe that any person is violating or intends to violate any provision of this chapter it may order, in addition to all other remedies, the person immediately to desist and refrain from such conduct. The board may apply to an administrative law judge as provided under Article 5 of Chapter 23 of Title 1 for an injunction restraining the person from such conduct. An administrative law judge may issue a temporary injunction ex parte and upon notice and full hearing may issue any other order in the matter it considers proper. No bond is required of the board by an administrative law judge as a condition to the issuance of any injunction or order contemplated by the provisions of this section.