1 Pa. Code § 35.145
The testimony of a witness may be taken by deposition, upon application by a participant in a proceeding pending before the agency, before the hearing is closed, upon approval by the agency head or the presiding officer.
This section cited in 1 Pa. Code § 35.137 (relating to oral examination); 4 Pa. Code § 89.31 (relating to investigation); 4 Pa. Code § 265.3 (relating to level II hearings); 4 Pa. Code § 615.13 (relating to subpoenas); 7 Pa. Code § 179.16 (relating to limited discovery); 25 Pa. Code § 1021.102 (relating to discovery); 34 Pa. Code § 95.94 (relating to depositions); 34 Pa. Code § 131.62 (relating to oral depositions); 34 Pa. Code § 131.63 (relating to time for taking oral depositions); 34 Pa. Code § 131.64 (relating to notice of oral depositions); 34 Pa. Code § 131.65 (relating to objections to taking of oral depositions); 34 Pa. Code § 131.68 (relating to discovery of records); 34 Pa. Code § 131.70 (relating to discovery of statements of parties or witnesses); 34 Pa. Code § 131.204 (relating to UEGF subpoenas and interrogatories); 40 Pa. Code § 15.49 (relating to deposition); 40 Pa. Code § 17.6 (relating to depositions and discovery); 49 Pa. Code § 31.103 (relating to applicability of other laws and rules); 49 Pa. Code § 31.115 (relating to disciplinary sanctions); 51 Pa. Code § 21.5 (relating to conduct of investigations); 52 Pa. Code § 5.321 (relating to scope); 52 Pa. Code § 5.343 (relating to procedures in deposition by oral examination); 52 Pa. Code § 1005.162 (relating to depositions); 55 Pa. Code § 41.120 (relating to limitations on scope of discovery); and 58 Pa. Code § 493a.11 (relating discovery).