In carrying out this subpart, the Secretary of Transportation may—

(1) inquire into the management of the business of an air carrier and obtain from the air carrier, and a person controlling, controlled by, or under common control with the carrier, information the Secretary decides reasonably is necessary to carry out the inquiry;

(2) confer and hold a joint hearing with a State authority; and

(3) exchange information related to aeronautics with a government of a foreign country through appropriate departments, agencies, and instrumentalities of the United States Government.