All public bonds issued under this chapter may be sold at a price not less than ninety-eight percent of par, plus accrued interest from the date of the bonds to the date of delivery of the bonds. [C24, 27, 31, 35, 39, § 1175; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §75.5 ] 83 Acts, ch 90, §15