At least 15 days prior to the election, the board of supervisors shall select one or more polling places within the proposed district, and make all suitable arrangements for the holding of the election. It shall select and appoint from among the qualified electors of the proposed district one inspector and two judges of election in each polling place, who shall constitute the officers of the election and the election board. If no officers are so appointed or if any officer appointed does not attend at the opening of the polls on the morning of the election, the electors present may appoint substitutes to fill the election board.