In the resolution authorizing the issuance of an installment or series of bonds, the commission may prescribe the extent to which facsimile signatures and facsimile seals instead of manual signatures and manually impressed seals may be used in executing the bonds and appurtenant coupons. Interest coupons may be signed by the facsimile signatures of the presiding officer and the director.
Tex. Parks and Wild. § 21.014