Mississippi Code Title 61. Aviation § 61-3-43

All bonds and notes shall be executed in the name of the authority by the manual or facsimile signatures of such officials, including a financial officer, as may be designated by resolution and shall be under the seal (or a facsimile thereof) of the authority. At least one signature on each such bond or note shall be a manual signature. Coupons attached to a bond may be executed by the facsimile signature of the financial officer signing the bond.