210 Pa. Code Rule 1551
(a) Appellate jurisdiction petitions for review.—Review of quasijudicial orders shall be conducted by the court on the record made before the government unit. Only questions raised before the government unit shall be heard or considered, except:
(3) Questions that the court is satisfied the petitioner could not by the exercise of due diligence have raised before the government unit. If, upon hearing before the court, the court is satisfied that any such additional question within the scope of this paragraph should be raised, it shall remand the record to the government unit for further consideration of the additional question.
The court may in any case remand the record to the government unit for further proceedings if the court deems them necessary.
The provisions of this Rule 1551 amended July 8, 2004, effective 60 days after adoption, 34 Pa.B. 3862; amended January 7, 2020, effective August 1, 2020, 50 Pa.B. 505. Immediately preceeding text appears at serial pages (389965) to (389966).