Iowa Code § 275.20
The voters shall vote separately in each existing school district affected and voters residing in the entire existing district are eligible to vote upon the proposition to create a new school corporation and on any additional provision authorized pursuant to section 275.12, subsection 6. If a proposition receives a majority of the votes cast in each of at least seventy-five percent of the districts, and also a majority of the total number of votes cast in all of the districts, the proposition is carried.
[R60, §2097, 2105; C73, §1800, 1801; C97, §2794; SS15, §2794, 2794-a; C24, 27, 31, 35, §4142, 4166, 4167, 4191; C39, §4142, 4144.1, 4166, 4167; C46, 50, §274.24, 274.27, 276.13; C54, §275.20, 275.21; C58, 62, 66, 71, 73, 75, 77, 79, 81, §275.20] 89 Acts, ch 135, §66; 2014 Acts, ch 1013, §19
Referred to in §257.11A, 275.11, 275.22, 275.23, 275.23A, 275.24