52 Pa. Code § 1005.148 – Official and judicial notice of fact.

(a) Official notice or judicial notice of facts may be taken by the Authority or the presiding officer.
(b) When the decision of the Authority or the presiding officer rests on official notice or judicial notice of a material fact not appearing in the evidence in the record, the parties will be so notified.
(c) Upon notification that facts are about to be or have been noticed, a party adversely affected shall have the opportunity upon timely request to show that the facts are not properly noticed or that alternative facts should be noticed.
(d) The Authority or the presiding officer in its discretion will determine whether written presentations suffice, or whether oral argument, oral evidence or cross-examination is appropriate in the circumstances.
(e) Subsections (a)—(d) supersede 1 Pa. Code § 35.173 (relating to official notice of facts).