Idaho Code § 34-1415: election zones, districts, and subdistricts.

Any city or special district subject to the provisions of this chapter whose governing body members are elected by separate zones, districts, or subdistricts shall notify the county clerk of any approved changes in the boundaries of such zones, districts, or subdistricts within thirty (30) days after the approval of such changes or within thirty (30) days prior to the filing deadline for candidates for the governing body, whichever is earlier.