Evidence of Signatures of Bond Owners and Ownership of Bonds. (a) Any request, consent, revocation of consent or other instrument that this Pledge Agreement may require or permit to be signed and executed by the Owners may be in one or more instruments of similar tenor, and shall be signed or executed by such Owners in person or by their attorneys appointed in writing. The fact and date of the execution by any Owner of the Bonds or his attorney of such instruments may be proved by a guaranty of the signature thereon by a bank, trust company or national banking association or by the certificate of any notary public or other officer authorized to take acknowledgments of deeds, that the person signing such request or other instrument acknowledged to him the execution thereof, or by an affidavit of a witness of such execution, duly sworn to before such notary public or other officer. Where such execution is by an officer of a corporation or association or a member of a partnership, on behalf of such corporation, association or partnership, such signature guaranty, certificate or affidavit also shall constitute sufficient proof of his authority.
