Idaho Code § 50-1306
All plats situate within an officially designated area of city impact as provided for in section 67-6526, Idaho Code, shall be administered in accordance with the provisions set forth in the adopted city or county zoning and subdivision ordinances having jurisdiction. In the situation where no area of city impact has been officially adopted, the county with jurisdiction shall transmit all proposed plats situate within one (1) mile outside the limits of any incorporated city which has adopted a comprehensive plan or subdivision ordinance to said city for review and comment at least fourteen (14) days before the first official decision regarding the subdivision is to be made by the county. Items which may be considered by the city include, but are not limited to, continuity of street pattern, street widths, integrity and continuity of utility systems and drainage provisions. The city's subdivision ordinance and/or comprehensive plan shall be used as guidelines for making the comments hereby authorized. The county shall consider all comments submitted by the city. Where the one (1) mile area of impact perimeter of two (2) cities overlaps, both cities shall be notified and allowed to submit comments.
Idaho Code § 50-1306