(a) No employee shall appear, in response to a demand for official records or information, in any proceeding to which this part applies to provide testimony and/or produce records or other official information without prior authorization as set forth in this part.

(b) This part is intended only to provide procedures for responding to demands for testimony or production of records or other official information, and is not intended to, does not, and may not be relied upon to, create any right or benefit, substantive or procedural, enforceable by any party against TVA and the United States.