(a) At the request of a party or the party's counsel, a deposition in a contested case that is filed with a state agency may be opened by an employee of the agency.
(b) A state agency employee who opens a deposition shall:
(1) endorse on the deposition the day and at whose request it was opened; and
(2) sign the deposition.
(c) The deposition shall remain on file with the state agency for the inspection of any party.