(a) General. The board, upon request timely and reasonably made, may quash a subpoena or subpoena duces tecum entirely, modify it, or direct compliance with it upon terms or conditions. The request to quash shall be made to the Subpoena Coordinator at board headquarters and shall include specific reasons for the request.

(b) Criteria. The board shall consider the objections to a subpoena or a subpoena duces tecum in light of all available information. The guiding principles shall be to protect witnesses from unreasonable and oppressive demands and to ensure their safety.