52 Pa. Code § 29.34
If a trustee, receiver, assignee, custodian or similar officer or officers is appointed by a court of competent jurisdiction, or is selected by creditors in accordance with provisions of law, with authority to take or retain possession and to operate the property and business of a certificate holder, the officer shall have authority to perform the service authorized in the certificate of the debtor carrier for a period of 90 days from his appointment or selection. The officer may petition the Commission for authority to conduct the operations for an additional period of time, and the Commission may, for good cause shown, grant authority. If the petition is filed within 90 days of the appointment or selection of the petitioner, he shall have authority to continue the operations pending decision by the Commission on the petition. Pertinent orders or decrees of the court having jurisdiction may be deemed cause for the granting of petitions by the Commission.
52 Pa. Code § 29.34
This section cited in 52 Pa. Code § 29.35 (relating to limitations).