Source: <a class="external free" href="https://en.wikipedia.org/wiki/Election_audit#Table_of_U.S._audit_rules">https://en.wikipedia.org/wiki/Election_audit#Table_of_U.S._audit_rules</a>
<p>More detail on election audits is in the source and in <a class="external free" href="https://commons.wikimedia.org/wiki/File:State_audits.png">https://commons.wikimedia.org/wiki/File:State_audits.png</a>
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In some states the public can conduct audits, where ballots or electronic ballot images are available to the public, shown at <a class="external free" href="https://commons.wikimedia.org/wiki/File:Ballot-foia.png">https://commons.wikimedia.org/wiki/File:Ballot-foia.png</a>
<a href="//commons.wikimedia.org/wiki/User:Numbersinstitute" title="User:Numbersinstitute">Numbersinstitute</a>
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