40 Pa. Stat. § 910-42
Every member of or subscriber to a rating organization shall adhere to the filings made on its behalf by such organization, except that any title insurance company which is a member of or subscriber to a rating organization may file with the commissioner a uniform percentage of decrease or increase to be applied to any or all elements of the fees produced by the rating system so filed for a class of title insurance which is found by the commissioner to be a proper rating unit for the application of such uniform decrease or increase, or to be applied to the rates for a particular area, or with respect to the amount of commissions to be paid. Such deviation filing shall specify the basis for the modification and shall be accompanied by the data or historical pattern upon which the applicant relies. A copy of the filing and data shall be sent simultaneously to such rating organization. Any such deviation filing shall be on file for a waiting period of thirty days before it becomes effective. Extension of such waiting period may be made in the same manner that such period is extended in the case of rate filings. Upon written application of the person making the filing, the commissioner may authorize a deviation filing or any part thereof to become effective before the expiration of the waiting period or any extension thereof. Deviation filings shall be subject to the provisions of section 740. Each deviation shall be effective for at least one year from the date such deviation is filed unless terminated sooner with the approval of the commissioner, or in accordance with the provisions of section 740.
40 P.S. § 910-42