All state school facilities bonds issued under this chapter must be signed by the Governor and the State Treasurer. The Governor and the State Treasurer may sign these obligations by a facsimile of their signatures. The Great Seal of the State must be affixed to, impressed on, or reproduced upon each of them and each must be attested by the Secretary of State. The delivery of the state school facilities bonds executed and authenticated is valid notwithstanding changes in officers or seal occurring after the execution or authentication.