Idaho Code § 43-2506
The notice of intention shall be published in the official newspaper of the district. If the district is located in more than one (1) county, the notice of intention may be published only in the county where the property to be assessed in the proposed local improvement district is located. Publication shall be in three (3) consecutive issues if a daily newspaper, or in two (2) issues if a weekly newspaper or in case no newspaper is published in such district then by posting for five (5) days in three (3) public places within the proposed local improvement district. A copy of such notice shall be mailed to each owner of property, if known, or his agent, if known, within the limits of the proposed local improvement district, addressed to such person at his post office address if known, or if unknown, to a post office in the district where the improvement is to be made. Ownership of property shall be determined as of the date of the adoption of the resolution of intent to create. The hearing shall take place not less than ten (10) days from the date of the first of said publications or postings or the date of said mailing, whichever is later.
Idaho Code § 43-2506