1. The office of treasurer is an elective office except that if a vacancy occurs in the office, a successor shall be elected or appointed to the unexpired term as provided in chapter 69 . 2. A person elected or appointed to the office of treasurer shall qualify by taking the oath of office as provided in section 63.10 and give bond as provided in section 64.10 . 3. The term of office of the treasurer is four years. [C51, §96, 151, 239; R60, §224, 473; C73, §589; C97, S13, §1072; C24, 27, 31, 35, 39, § 520; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §39.17 ; S81, §331.551 ; 81 Acts, ch 117, §550 ] 2010 Acts, ch 1033, §46