Texas Government Code - GOV'T § 2306.374. Facsimile Signatures and Seals

(a) The board may state in a resolution authorizing the issuance of an installment or series of bonds the extent to which the presiding officer of the board or any other officer may use a facsimile signature or facsimile seal instead of a manual signature or manually impressed seal to execute or attest the bonds and appurtenant coupons.

(b) An interest coupon may be signed by the facsimile signature of the presiding officer of the board.