Rule 21-300 Canon 3.

Judges have to be careful about their personal life and outside activities so they don't create problems with their job on the bench. This means a judge should think ahead about how their choices outside the courtroom might affect their ability to be fair and impartial when hearing cases.

For example, a judge's hobbies, memberships, side work, or relationships could create a conflict if they're not handled carefully. The rule doesn't ban judges from having outside interests, but it puts the responsibility on them to keep those interests from interfering with their duties as a judge. If a judge fails to do this, it can raise questions about whether they can be trusted to be neutral in cases they handle.

For people involved in a court case, this rule matters because it helps protect the fairness of the legal system. It means judges are expected to actively avoid situations in their personal lives that could make people doubt their honesty or impartiality in court.