In district election officers, further providing for election officers to be sworn; in dates of el ections and primaries and special elections, further providing for affidavits of candidates; in nomination of candidates, further providing for petition may consist of several sheets and statement of circulator, for affidavits of candidates, for examination of nomination petitions, certificates and papers and return of rejected nomination petitions, certificates and papers, for vacancy in party nomination by failure to pay filing fee or for failure to file loyalty oath, for affidavits of candidates, for filling of certain vacancies in public office by means of nomination certificates and nomination papers and for substituted nominations to fill certain vacancies for a November election; in ballots, further providing for form of ballots and printing ballots; in returns of primaries and elections, further providing for manner of computing irregular ballots; and replacing references to "justice of the peace" with "magisterial district judge."