75 Pa. C.S. § 2006
If, at any time after the waiting period or extension thereof as provided in section 2003(a) (relating to waiting period for filings), the commissioner finds that a rate filing does not meet the requirements of applicable statutes governing the establishment of rates or upon application by a person, other than the insurer or rating organization that made the filing, aggrieved by a rate filing for which the waiting period has expired, the commissioner may hold a hearing upon not less than ten days' written notice to every insurer or rating organization which made the filing, specifying the matters to be considered at the hearing. If, after the hearing, the commissioner finds that the filing fails to meet the requirements of applicable statutes governing the establishment of rates, he shall issue an order specifying his findings and stating when, within a reasonable period thereafter, the filing or portions thereof shall be deemed no longer effective. The order shall be sent to every affected insurer and rating organization. The order shall not affect any contract or policy made or issued prior to the expiration of the period set forth in the order.
75 Pa.C.S. § 2006