72 Pa. Stat. § 5341.17
The board shall have exclusive custody and control of all books and records relating to the assessment of subjects of taxation within the county. In addition to the records prescribed in section six of this act, the board shall prepare and maintain books or other suitable records of the assessments made upon all subjects of taxation within the county, which records shall include a description of the property or other subject of taxation, the amount of the assessment thereof, and the name and address of the person or persons taxable. In the case of real property assessments, such books or records shall be in conformity with the book of plans furnished by the chief engineer and surveyor, or similar officer, of the county, and shall be arranged according to wards and dates. Upon completion of the annual assessment, the board shall prepare copies of such books or records, and shall transmit copies thereof to the officer or officers charged with the duty of collecting taxes in the county, and to the county controller.
72 P.S. § 5341.17