Pennsylvania Statutes Title 25 P.S. Elections & Electoral Districts § 299. Right to vote at primary

An elector duly registered and enrolled as a member of a political party, if otherwise qualified, may vote the ballot of said party at a primary, subject to the provisions of this act. No elector enrolled and registered as a member of any one particular party shall be allowed to receive or vote the ballot of any other political party at a primary election, and no elector who is not enrolled and registered as a member of some political party shall be permitted to vote at any primary election.