(b) The Commissioner may investigate any person if the Commissioner has reasonable cause to believe that the person has violated any provision of this subtitle or a regulation adopted under it.

(c) Without limitation of the powers granted to the Commissioner under Title 2 of this article, in connection with an investigation under this section, the Commissioner may:

(d) For the purpose of conducting an investigation under this section, the Commissioner may not require an administrator to submit to the Commissioner, more than once in a 12-month period, any books or records of a plan administered by the administrator unless the Commissioner has reasonable cause to believe that a violation of this subtitle or a regulation adopted or order issued under it exists.

(e) Subject to subsection (f) of this section, the Commissioner may make available information about a matter that may be subject to an investigation to:

(f) Unless disclosure is required by a court of competent jurisdiction in a legal proceeding, the Commissioner shall keep confidential and may not disclose a trade secret or commercial information contained in: