In the conduct of investigations and formal hearings, the Commission may (i) administer oaths and affirmations; (ii) order and otherwise provide for the inspection of books and records; and (iii) issue subpoenas for the attendance of witnesses and the production of papers, books, accounts, documents, and other records or tangible evidence relevant to any such investigation or formal hearing. The power to administer oaths and affirmations, to issue subpoenas, or to make orders for or concerning the inspection of books and records may be exercised by any member of the Commission, unless the Commission shall otherwise determine.