25 Pa. Stat. § 3155
The county board, in computing the votes cast at any primary or election, shall compute and certify votes cast on irregular ballots exactly as such names were written, stamped or deposited in or on receptacles for that purpose, and as they have been so returned by the election officers. In districts in which paper ballots or ballots cards are electronically tabulated, stickers or labels may not be used to mark ballots. A vote cast by means of a sticker or label affixed to a ballot or ballot card shall be void and may not be counted. In the primary the Secretary of the Commonwealth shall not certify the votes cast on irregular ballots for any person for a national office including that of the President of the United States, United States Senator and representative in Congress; or for any State office including that of Governor and Lieutenant Governor, Auditor General, State Treasurer, senator and representative in the General Assembly, justices and judges of courts of record or for any party office including that of delegate or alternate delegate to national conventions and member of state committee unless the total number of votes cast for said person is equal to or greater than the number of signatures required on a nomination petition for the particular office. In the primary the county board shall not certify the votes cast on irregular ballots for any person for a justice of the peace, constable, national, state, county, city, borough, town, township, ward, school district, election or local party office unless the total number of votes cast for said person is equal to or greater than the number of signatures required on a nomination petition for the particular office.
25 P.S. § 3155