A.R.S. § 16-448: Write-in votes; instructions

Whenever ballots are to be counted by electronic data processing equipment, all write-in votes for candidates, to be counted, shall be marked by the voter in the space provided opposite the names of the write-in candidates. The instructions to voters printed on the ballots shall instruct the voter that the vote will not be counted unless the voter properly marks the ballot when writing in a candidate's name.