The treasurer may deposit for safekeeping with a designated depository or a federal reserve bank any bonds, notes, bills, debentures, obligations, or certificates of indebtedness in which the moneys of the taxing unit or its agencies are invested pursuant to law; provided the treasurer shall take from the designated depository a receipt for the securities deposited. A treasurer may accept securities in authorized book entry form. The treasurer shall not be responsible for securities so deposited until they are withdrawn by the treasurer from the designated depository, except insofar as a violation by the treasurer of the prudent man investment rule contributes to any loss.
Idaho Code § 57-127A