25 Pa. Stat. § 2650 : Statutes (Unconsolidated) — ELECTIONS & ELECTORAL DISTRICTS — ELECTION CODE — COUNTY BOARDS OF ELECTIONS — Watchers or attorneys at sessions of county board; candidates may be present

(a) Any party or political body or body of citizens which now is, or hereafter may be, entitled to have watchers at any registration, primary or election, shall also be entitled to appoint watchers who are qualified electors of the county or attorneys to represent such party or political body or body of citizens at any public session or sessions of the county board of elections, and at any computation and canvassing of returns of any primary or election and recount of ballots or recanvass of voting machines under the provisions of this act. Such watchers or attorneys may exercise the same rights as watchers at registration and polling places, but the number who may be present at any one time may be limited by the county board to not more than three for each party, political body or body of citizens.
(b) Every candidate shall be entitled to be present in person or by attorney in fact duly authorized, and to participate in any proceeding before any county board whenever any matters which may affect his candidacy are being heard, including any computation and canvassing of returns of any primary or election or recount of ballots or recanvass of voting machines affecting his candidacy.
(c) Any candidate, attorney or watcher present at any recount of ballots or recanvass of voting machines shall be entitled to examine the ballots, or the voting machine and to raise any objections regarding the same, which shall be decided by the county board, subject to appeal, in the manner provided by this act.

25 P.S.§ 2650

1937, June 3, P.L. 1333, art. III, § 310.