1 Pa. Code § 31.11
Pleadings, submittals or other documents required or permitted to be filed under this part, the regulations of the agency or any other provision of law shall be received for filing at the office of the agency within the time limits, if any, for the filing. The date of receipt at the office of the agency and not the date of deposit in the mails is determinative.
1 Pa. Code § 31.11
This section cited in 4 Pa. Code §607a.5 (relating to filings with Docket Clerk); 7 Pa. Code §131.11 (relating to time); 7 Pa. Code §179.3 (relating to filings and appeals); 7 Pa. Code §179.105 (relating to evidentiary documents); 12 Pa. Code § 11.3 (relating to timely filing); 16 Pa. Code §42.14 (relating to time of filing); 34 Pa. Code §111.3 (relating to definitions); 34 Pa. Code §131.11 (relating to filing, service and proof of service); 34 Pa. Code §131.12 (relating to modification of time); 37 Pa. Code §197.4 (relating to filings); 52 Pa. Code §1.11 (relating to date of filing); 52 Pa. Code §1001.11 (relating to date of filing); 55 Pa. Code §41.6 (relating to timely filing required); 58 Pa. Code §145.4 (relating to time of filing); 58 Pa. Code §497a.1 (relating to date of filing); 61 Pa. Code §702.11 (relating to filing); and 61 Pa. Code §703.2 (relating to petition content).