1 Pa. Code § 33.41
An amendment to a submittal may be tendered for filing any time and shall be deemed filed as of the date of tender unless the agency shall otherwise order.
This section cited in 34 Pa. Code § 111.15 (relating to no other pleadings allowed); 34 Pa. Code § 131.35 (relating to amendments to pleadings); 34 Pa. Code § 131.36 (relating to joinder); 49 Pa. Code § 31.103 (relating to applicability of other laws and rules); 49 Pa. Code § 31.115 (relating to disciplinary sanctions); 52 Pa. Code § 1.81 (relating to amendments); 52 Pa. Code § 1001.81 (relating to amendments); 55 Pa. Code § 41.25 (relating to amendment or withdrawal of legal documents); and 61 Pa. Code § 703.5 (relating to other submissions).