An Act amending the act of June 3, 1937 (P.L.1333, No.320), known as the Pennsylvania Election Code, in qualifications of electors, further providing for qualifications of electors at primaries; in party organization, further providing for only enrolled electors to vote at primaries or hold party offices; in nomination of candidates, further providing for candidates to be nominated and party officers to be elected at primaries; and, in preparation for and conduct of primaries and elections, further providing for manner of applying to vote, persons entitled to vote, voter's certificates, entries to be made in district register, numbered lists of voters and challenges.