Pennsylvania Statutes Title 72 P.S. Taxation and Fiscal Affairs § 5341.10. Notice of increase or decrease in assessment, valuation and ratio;  appeal;  notice

(a) At least ten days prior to the first Monday in October of each year, the board shall give printed or written notice to the registered owners of all real property situated within the county, the assessment, valuation and ratio upon which has been increased or decreased, specifying the change made from the last preceding assessment, valuation and ratio, and setting forth that an appeal may be filed from such assessment on or before the first Monday of October, and stating as definitely as possible the time or times at which appeals will be heard by the board.  Every such notice shall be given either by mailing or delivering the same to the address of the owner as shown upon the records of the board, or by posting upon the assessed property.

(b) Notice similar to that provided for in subsection (a) shall be given when the county changes the established predetermined ratio.