Bonds of the authority may be executed by the manual or facsimile signatures of the board members or officers of the authority authorized by the resolution of the authority to execute the bonds. If the resolution authorizes or directs the affixing of the seal of the authority on bonds of the authority, the seal or a facsimile thereof may be impressed or imprinted thereon. If any board members or officers of the authority ceases to be members or officers of the authority before the delivery of any bonds or coupons signed by them, their signatures or facsimiles thereof shall nevertheless be valid and sufficient for all purposes, the same as if the members or officers had remained in office until the delivery.
SDCL 1-16B-65