All moneys received relating to turnpike projects, whether as proceeds from the sale of bonds or as revenues, shall be deemed to be trust funds to be held and applied solely for turnpike projects. A resolution authorizing bonds of any issue or a trust agreement securing bonds shall provide that any officer with whom, or any bank or trust company with which, the moneys shall be deposited shall act as trustee of the money and shall hold and apply it for the purposes of the turnpike project, subject to the resolution or as a trust agreement may provide.
Idaho Code § 40-406