204 Pa. Code § 91.12
Unless notice is waived, no deposition shall be taken except after at least ten days' notice to the participants if the deposition is to be taken within this Commonwealth, and 15 days' notice when a deposition is to be taken elsewhere. Such notice shall be given in writing (Form DB-16) (Notice of Deposition) by the participant proposing to take such deposition to the other participants and to the hearing committee or special master. In such notice and application to take evidence by deposition, the participant desiring to take the deposition shall state the name and post office address of the witness, the subject matter concerning which the witness is expected to testify, the time and place of taking the deposition, the name and post office address of the notarial officer before whom it is desired that the deposition be taken, and the reason why such deposition should be taken. The other participants may, within the time stated in this section, make any appropriate response to such notice and application.
204 Pa. Code § 91.12