4 Pa. Code § 7.912
Except as required by an order of a court of competent jurisdiction, no agency, board, commission or council under the Governor's jurisdiction (Executive Agency), and no employee, appointee, officer or other person acting on behalf of any Executive Agency, may provide any information or expend or use time, money, facilities, property, equipment, personnel or other Commonwealth resources in furtherance of any investigation or proceeding initiated in or by another state that seeks to impose civil or criminal liability or professional discipline upon a person or entity for:
This restriction shall not apply to any investigation or proceeding where the conduct that is subject to potential liability under the investigation or proceeding initiated in or by the other state would be subject to civil or criminal liability or professional discipline under the laws of the Commonwealth if committed in this Commonwealth or if action is required by Federal law. Notwithstanding the general prohibition of this section, Executive Agencies and individuals acting on their behalf may provide information or assistance in connection with such an investigation or proceeding in response to the written request of a person or entity that is the subject of such an investigation or proceeding.
4 Pa. Code § 7.912