71 Pa. Stat. § 1444
The rules and regulations of the Industrial Board, and the amendments and alterations thereof, may embrace all matters and subjects to which power and authority of the Department of Labor and Industry extends, and shall be distributed to all applicants. Any employer, employé, or other person interested, either because of ownership in or occupation of any property affected by any such order or regulation, or otherwise, may petition for a hearing on the reasonableness of a rule or regulation. Such petition for hearing shall be by verified petition, filed with the said Industrial Board, setting out specifically and in full detail the rule or regulation upon which a hearing is desired, and the reasons why such rule or regulation is deemed to be unreasonable. All hearings of the board shall be open to the public. Upon receipt of such petition, if the issues raised in such petition have theretofore been adequately considered, the Industrial Board shall determine the same by confirming, without hearing, its previous determination; or, if such hearing is necessary to determine the issue raised, the Industrial Board shall order a hearing thereon, and consider and determine the matter or matters in question at such time as shall be prescribed. Notice of the time and place of such hearing shall be given to the petitioner, and to such other persons as the Industrial Board may find directly interested in such decision.
71 P.S. § 1444