Issue subpoenas to any person.
Administer an oath or affirmation to any person. Conduct hearings in aid of any investigation or inquiry. Prescribe such forms and promulgate such procedural rules and regulations as may be necessary to enforce the provisions of this article, which rules and regulations shall have the force of law. Such rules and regulations shall not be inconsistent with the provisions of this article. Service within or without this state in the manner provided under applicable law or rules of procedure for the service of a summons and complaint in a civil action.