31 Pa. Code § 129.12
If the company fails to provide the Department with the requested information within 30 days from the date of the request or fails to offer a satisfactory written explanation as to why the information was not made available, the captioned filing will be deemed to have been withdrawn and the company will be so notified.
Deemed Approval
A Department letter in which it is stated that the Department has questions, comments, or requests which must be addressed in order to continue its review cannot be considered a request for additional information so as to trigger a deemed withdrawal. The Department’s subsequent failure to timely disapprove a rate filing resulted in its deemed approval. Nationwide Mutual Insurance Co. v. Insurance Department, 583 A.2d 507 (Pa. Cmwlth. 1990).