Idaho Code § 42-5218B

The secretary of the district shall give notice of all elections in the district by posting the same in five (5) public places in each county in which a part of the district is situated and in the office of the board of directors at least four (4) weeks before the day of such election, or by publication of the notice once a week for four (4) successive weeks in a newspaper or newspapers published in each of said counties or in a newspaper of general circulation therein. Notices shall state the time of the election and the location of polling places within the district and the directors to be elected or other question to be voted upon, as the case may be.