(30 ILCS 355/10) (from Ch. 85, par. 1397c)
    Sec. 10. Bonds shall be executed by the Director or the Budget Director, as the case may be, and attested by the Secretary of State and countersigned by the Treasurer. If Bonds are issued in registered form pursuant to the Registered Bond Act, each of the signatures may be printed facsimile signatures. The trust indenture may also require that each Bond be authenticated by the manual signature of the trustee thereunder. Unless Bonds are issued in fully registered form, interest coupons with facsimile signatures of the Director or the Budget Director, as the case may be, the Secretary of State, and the Treasurer may be attached to the Bonds. The fact that an officer whose signature or facsimile thereof appears on the Bond, interest coupon, indenture or agreement authorized under this Act no longer holds such office at the time the Bond, coupon, indenture or agreement is delivered shall not invalidate such Bond, coupon, indenture or agreement.
(Source: P.A. 86-44.)