Idaho Code § 42-4203
After receipt of the petition, map and statement, the director shall review and examine the same and may require the submission of such additional or revised data concerning the boundaries of the proposed district, the location and nature of the diversion works and facilities to be constructed, the costs of construction or any other matter relevant to the formation of the district as he may deem necessary. The director shall conduct a hearing on the petition and supporting documents. Notice of the time and place of the hearing shall be published by the director in a newspaper or newspapers published in each of the counties or a newspaper of general circulation therein at least three (3) weeks before the date of the hearing.
Within ninety (90) days after the hearing has been concluded, the director after due consideration of all relevant data and testimony, shall determine whether the proposed district will provide the benefits described, whether the boundaries proposed are proper with respect to the benefits to be provided, and whether the formation of the district will serve the interests of the water users proposed to be benefited. On the basis of his determination, the director shall enter an order either establishing the aquifer recharge district and defining the boundaries thereof to reflect the area to be benefited, or denying the formation of the district. If the director orders formation of the district, he shall cause copies of the order, duly certified, to be filed with the secretary of state and board of county commissioners, county recorder, county assessor and county treasurer of each county in which any part of the district is situated.
Idaho Code § 42-4203