La. Stat. tit. 17 § 2183
The said bonds, notes or certificates of indebtedness shall have all the qualities of negotiable paper, shall be authorized and issued by resolution or resolutions adopted by the Board of Supervisors and shall be of such series, bear such date or dates, mature at such time or times (not exceeding forty years from their respective dates), bear interest at such rate or rates not exceeding six per centum per annum, payable annually or semi-annually, be in such denominations, be in such form, either coupon or fully registered without coupons, carry such registration and exchangeability privileges, be payable in such medium of payment and at such place or places, be subject to such terms of redemption, and be entitled to such priorities on the revenues pledged to the payment thereof as such resolution or resolutions may provide. The bonds, notes, or certificates of indebtedness shall be signed by the chairman or the vice chairman and attested by the secretary of the board of supervisors, and coupon bonds shall have attached thereto interest coupons bearing the facsimile signatures of the officers who sign the bonds. They shall have affixed thereto the seal of the board of supervisors. Any such bonds, notes or certificates of indebtedness may be issued and delivered notwithstanding that one or more of the officers signing such bonds or the officer or officers whose facsimile signature or signatures may be upon the coupons shall have ceased to be such officer or officers at the time such bonds shall actually have been delivered.
The board of supervisors may authorize the issuance of refunding bonds, notes, or certificates of indebtedness, for the purpose of refunding outstanding bonds, notes or certificates of indebtedness issued pursuant to this Sub-Part. Such refunding bonds, notes, or certificates of indebtedness may either be sold and the proceeds applied to or deposited in escrow for the retirement of the outstanding bonds, notes, or certificates of indebtedness, or may be delivered in exchange for the outstanding bonds, notes, or certificates of indebtedness. The refunding bonds, notes, or certificates of indebtedness shall be authorized in all respects as original bonds, notes, or certificates of indebtedness are herein required to be authorized, and the board of supervisors, in authorizing the refunding bonds, notes, or certificates of indebtedness, shall provide for the security of the bonds, notes, or certificates of indebtedness, the sources from which they are to be paid, and the rights of the holders thereof in all respects, as herein provided for other bonds, notes, or certificates of indebtedness issued under the authority of this Sub-Part. The board of supervisors may also provide that the refunding bonds, notes, or certificates of indebtedness shall have the same priority of lien on the revenues pledged for their payment as was enjoyed by the bonds, notes, or certificates of indebtedness refunded. No bonds, notes, or certificates of indebtedness may be refunded hereunder unless they either mature or are callable for redemption under their terms within ten years from the date of issuance of the refunding bonds, notes, or certificates of indebtedness, or unless the holders thereof voluntarily surrender them in exchange for payment.
La. R.S. § 17:2183