CA Gov't Code Section 18672.1

(a)

A person served with a subpoena or a subpoena duces tecum may object to its terms by a motion for a protective order, including a motion to quash made orally to the board or its authorized representative or in writing.

(b)

The objection shall be resolved by the board or its authorized representative on terms and conditions that he or she declares. The board or its authorized representative may make any other order that is appropriate to protect the parties or the witness from unreasonable or oppressive demands, including violations of the right to privacy.