The bonds of members of the boards of supervisors, county attorneys, recorders, auditors, sheriffs, and assessors shall each be in a penal sum of not less than twenty thousand dollars. The amount of each bond shall be determined by the board of supervisors. [C51, §326, 327; R60, §556, 557; C73, §678; C97, §1185; S13, §1182-a, 1185; C24, 27, 31, 35, 39, § 1065, 1066; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, §64.8, 64.9; C81, §64.8 ] 83 Acts, ch 186, §10028, 10201 ; 88 Acts, ch 1108, §1 Referred to in §64.3 , 331.501 , 331.601 , 331.651 , 331.751