Idaho Code § 42-2023
In all cases where it shall, upon due proof being made, appear to the satisfaction of the director of the department of water resources that persons have made entry under what is commonly known as the Carey Act Laws of the state of Idaho, and have paid to the state of Idaho any fees, commissions or purchase moneys as required by the laws of the state of Idaho relating to Carey Act entries, which entries were, and the lands embraced in such entries have been, by order of the state board of land commissioners, the director of the department of water resources, or final decree of a court of competent jurisdiction, eliminated from the Carey Act project or segregation of which it was a part, and such order of elimination or judgment is based upon the ground that the water supply was deficient, and the entry is canceled or relinquished, the treasurer of the state of Idaho is authorized to repay to such persons or their legal representatives the fees, commissions and purchase moneys so paid by them, upon proper showing and presentation of such claim.
Idaho Code § 42-2023