All four ballots are interchangeable. The more structured ballots may aid voters in offering clear votes so they explicitly know all their choices. The Yes/No format can help to detect an "undervote" when a candidate is left unmarked, and allow the voter a second chance to confirm the ballot markings are correct.
[[Local organizations for approval voting]]▼
[[Consecutive Runoff Approval Voting]]▼
▲[[Consecutive Runoff Approval Voting]]
*[http://bcn.boulder.co.us/government/approvalvote/ Approval Voting Home Page]