Inspection and investigation

To carry out this part, the Secretary of Transportation may take actions the Secretary considers necessary, including— To carry out the Secretary’s responsibilities under this part and under chapter 51, the Secretary may authorize officers, employees, or agents of the Secretary to conduct, with or without making their presence known, the following activities in circumstances the Secretary finds to be reasonable: Intercepting a radio communication, with or without the consent of the sender or other receivers of the communication, but only where such communication is broadcast or transmitted over a radio frequency which is— Information obtained through activities authorized by paragraphs (1) and (2) shall not be admitted into evidence in any administrative or judicial proceeding except—