53 Pa. Stat. § 1722
The majority in interest and number required for petitions to councils shall be fixed as of the date of the presentation of said petition. After the passage or approval of any ordinance for the opening, widening, straightening, extending, grading, paving, macadamizing or otherwise improving any street or alley, notice shall, within ten days thereafter, be given by handbills posted in conspicuous places along the line of the proposed improvement, which notice shall state the fact of the passage or approval of the ordinance, the date of the passage or approval, that the petition for the improvement was signed by a majority in interest and number of owners of property abutting on the line of the proposed improvement, and that any person interested and denying the fact that said petition was so signed, may appeal to any court of common pleas of the proper county within sixty days from the passage or approval of said ordinance, and any person interested may, within sixty days from the passage or approval of said ordinance present a petition to any court of common pleas of the proper county setting forth the facts, whereupon the said court shall inquire and determine whether said improvement was petitioned for by the requisite majority, and if said court shall find that it was not so petitioned for, shall quash said ordinance, but if said court shall find that it was so petitioned for, it shall approve the ordinance. If no appeal shall be taken as aforesaid, or if the court on appeal shall approve the ordinance, the municipal corporation may proceed with the improvement, and thereafter all parties interested shall be estopped from denying the fact that said petition was signed by the requisite majority of property owners as required by this act. All assessments for benefits to pay damages, costs and expenses shall bear interest at the expiration of thirty days after they shall have been finally ascertained and fixed, and shall be payable to the treasurer or other proper officer of the municipality.
53 P.S. § 1722