Whenever the State Treasurer has the duty to safeguard any securities or evidences of indebtedness deposited with or held by him, he may provide for the custody and safekeeping of these securities or evidences of indebtedness in the manner provided in and by any bank or savings and loan association approved pursuant to "An Act in relation to State moneys", approved June 28, 1919, as amended.
15 ILCS 525/1