(a) Where the sale price is for an amount greater than the outstanding indebtedness of a municipal wharf improvement district, the excess shall be paid in cash.

(b) (1) (A) In the event the purchaser desires to purchase the property and pay off the bonded indebtedness of the district as the bonded indebtedness matures, as a part of the purchase price, then the purchaser shall be required to assume the payment of the indebtedness, together with the accrued interest on it. To secure the payment of the indebtedness, together with the accrued interest on the bonded indebtedness, the purchaser shall be required to give a bond in favor of the city and the district in an amount equal to the unpaid purchase price including the indebtedness of the district.

(B) The bond shall also be for the maintenance of the terminal and terminal facilities and shall remain in full force and effect until the unpaid purchase price, including the indebtedness of the district, has been paid in full. However, the city council and the board of improvement of the district shall have the right to reduce the amount of the bond from time to time in proportion to the amount of the indebtedness as discharged and retired by the purchaser of the improvements.

(2) The bond shall be further conditioned that the purchaser will maintain insurance upon the properties so purchased and sold for an amount to be agreed upon by the board and respective purchaser, with the loss payable clause for the benefit of the district making the sale, as its interests may appear.

(3) The bond provided for in this section shall be approved by the council and the board of the district and shall be made and executed by a corporate surety company authorized to do business in the State of Arkansas. However, the council and the board of the district shall, by their joint action, waive the execution of the bond required in this section when, in their judgment and discretion, the bond is not necessary or required for the protection of the city, the district, and the landowners.