Following the determination of the appropriate unit as required by Article VI of the act (43 P. S. §§ 1101.601-1101.607), the Board, or its authorized agent, will have the right to direct the employer to submit forthwith to the Board a list of the names and addresses of the employes in the appropriate unit, the list to be made available by the Board to any party to the proceeding who requests it.
34 Pa. Code § 95.16