Iowa Code § 49.47: Notice on ballots.

1. At the top of paper ballots for public measures shall be printed the following:

[Notice to voters. To vote to approve any question on this ballot, make a cross mark or check in the target before the word “Yes”. To vote against a question make a similar mark in the target preceding the word “No”.]

2. This notice shall be adapted to describe the proper mark where it is appropriate.