The board of county commissioners shall establish a convenient number of election precincts in the proposed district and define the boundaries thereof, and designate a polling place and appoint the necessary election officers for each precinct; which precincts may thereafter be changed by the district board. The election shall be conducted as nearly as practicable in the manner provided for the election of directors. Where a nonassessable area is situated in a district, any notice, delinquent list, or other announcement required by this title to be posted, may be posted in the area and any election may be held therein.