72 Pa. Stat. § 5971r
The provisions of this act, in so far as they are the same as those of any act repealed by this act, or of any existing act, shall be construed as a continuation of such laws and not as new enactments.
The repeal by this act of any provisions of existing laws shall not affect the validity or lien of any taxes heretofore returned by any tax collector or receiver of taxes to the county commissioners, or affect, abate or prevent any suit or prosecution pending to enforce collection of the same, or affect the sale of any lands pursuant to such existing laws; and as to taxes heretofore returned to the county commissioners pursuant to existing laws, this act shall be so construed only as to affect the remedy for enforcing collection of such taxes so returned on which proceedings for collection have not been heretofore instituted.
72 P.S. § 5971r