Idaho Code § 43-804
The purchaser of any lands within an irrigation district at a sale of lands acquired by a county on account of delinquent taxes, or the holder of a tax deed to any lands within an irrigation district, or the then owner of said lands, the water right to which has vested in said irrigation district under the provisions of this chapter, may, within six (6) months from the date of the issuance of the tax deed, or of the sale of said lands by the county, whichever is earlier, appear before the board of directors of said irrigation district at a regular or special meeting of said board and make application to redeem or repurchase the water right originally bought for use and to be made appurtenant to said land, and the said board of directors shall, upon receipt of payment of all taxes formerly delinquent against said land in favor of the irrigation district and expenses incurred by the district in connection therewith, reinstate said water right and thereafter said land and water shall be subject to all of the charges required to be paid by lands within the district: provided, however, that during the interim between the issuance of the tax deed to the land, or the sale of said land by the county as herein referred to, and the date of the application to redeem, water represented by said water right shall not be delivered to the land except upon the express consent of the board of directors of the irrigation district.
Should no redemption be made as herein provided within the period herein stated, title to the water right shall vest absolutely in the irrigation district.
Idaho Code § 43-804