25 Pa. Stat. § 2937
All nomination petitions and papers received and filed within the periods limited by this act shall be deemed to be valid, unless, within seven days after the last day for filing said nomination petition or paper, a petition is presented to the court specifically setting forth the objections thereto, and praying that the said petition or paper be set aside. A copy of said petition shall, within said period, be served on the officer or board with whom said nomination petition or paper was filed. Upon the presentation of such a petition, the court shall make an order fixing a time for hearing which shall not be later than ten days after the last day for filing said nomination petition or paper, and specifying the time and manner of notice that shall be given to the candidate or candidates named in the nomination petition or paper sought to be set aside. On the day fixed for said hearing, the court shall proceed without delay to hear said objections, and shall give such hearing precedence over other business before it, and shall finally determine said matter not later than fifteen (15) days after the last day for filing said nomination petitions or papers. If the court shall find that said nomination petition or paper is defective under the provisions of section 976, or does not contain a sufficient number of genuine signatures of electors entitled to sign the same under the provisions of this act, or was not filed by persons entitled to file the same, it shall be set aside. If the objections relate to material errors or defects apparent on the face of the nomination petition or paper, the court, after hearing, may, in its discretion, permit amendments within such time and upon such terms as to payment of costs, as the said court may specify. In case any such petition is dismissed, the court shall make such order as to the payment of the costs of the proceedings, including witness fees, as it shall deem just. If a person shall sign any nomination petitions or papers for a greater number of candidates than he is permitted under the provisions of this act, if said signatures bear the same date, they shall, upon objections filed thereto, not be counted on any petition or paper and if they bear different dates, they shall be counted in the order of their priority of date, for only so many persons as there are candidates to be nominated or elected. The office of the Prothonotary of the Commonwealth Court and the office of the Secretary of the Commonwealth and the various offices of prothonotary of the court of common pleas shall be open between the hours of eight-thirty o'clock A.M. and five o'clock P.M. on the last day to withdraw after filing nomination petitions and on the last day to file objections to nomination petitions.
25 P.S. § 2937