Rule 507 Political vote; privilege.

Here's a plain English summary of this rule:

If you voted in a political election using a secret ballot, you have the right to keep how you voted private. Nobody can force you to tell a court which way you voted, even if you're called as a witness in a case.

This privilege has one exception. If someone voted illegally, they cannot use this rule to hide that fact. In other words, the privilege protects honest voters who want to keep their vote private, but it does not protect someone who broke the law when they voted.

This rule exists because secret ballots are meant to stay secret. Elections only work well when people feel safe voting their true choice without fear of pressure or payback. This rule backs up that protection by making sure courts cannot force people to reveal their vote after the fact.