Okla. Stat. tit. 62, § 62-585: Execution of obligations - Signatures

A. A certificated registered public obligation shall be

executed by the issuer by the manual or facsimile signature or

signatures of authorized officers. Any signature of an authorized

officer may be attested by the manual or facsimile signature of

another authorized officer.

B. In addition to the signatures referred to in subsection A of

this section any certificated registered public obligation or any

writing relating to an uncertificated registered public obligation

may include a certificate or certificates signed by the manual or

facsimile signature of an authenticating agent, registrar, transfer

agent or the like.

C. At least one signature of an authorized officer,

authenticating official or other person required or permitted to be

placed on a certificated registered public obligation shall be a

manual signature.