53 Pa. C.S. § 8562
The following words and phrases when used in this subchapter shall have the meanings given to them in this section unless the context clearly indicates otherwise:
"Act 1939-404." The act of June 27, 1939 (P.L.1199, No.404), entitled "An act relating to the assessment of real and personal property and other subjects of taxation in counties of the first class; providing for the appointment of members of the board of revision of taxes by the judges of the courts of common pleas; providing for the appointment, by the board, of personal property assessors, real estate assessors and assistant real estate assessors, clerks and other employes; fixing the salaries of members of the board, assessors and assistant assessors, and providing for the payment of salaries and expenses from the county treasury; prescribing the powers and duties of the board and of the assessors, the time and manner of making assessments, of the revision and notice of assessments and of appeals therefrom; prescribing the records of assessments; and repealing existing laws."
"Assessment office." The office of property assessment in a city.
"Board." The board of revision of taxes or a successor body authorized by a city to determine assessment appeals in a city.
"City." A city of the first class.
"Common level ratio." The ratio of assessed value to market value as determined by the State Tax Equalization Board under the act of June 27, 1947 (P.L.1046, No.447), referred to as the State Tax Equalization Board Law.
"County." A county of the first class.
"Established predetermined ratio." The ratio of assessed value to market value established under Act 1939-404 and uniformly applied in determining assessed value in any year.
"Governing body." The governing body of a city.
"School district." A school district of the first class.
53 Pa.C.S. § 8562