The state treasurer may deposit for safekeeping with a state or national bank or a federal reserve bank any bonds, notes, bills, debentures, obligations, certificates of indebtedness, warrants, or other evidences of indebtedness in which the moneys of the state of Idaho or its agencies are invested pursuant to law; provided the treasurer shall take from the bank a receipt for the securities deposited. The state treasurer may accept securities in authorized book entry form. The state treasurer shall not be responsible for securities so deposited until they are withdrawn by the treasurer from the bank, except insofar as a violation by the treasurer of the prudent man investment rule contributes to any loss.
Idaho Code § 67-2746A