Passing an exam sounds good to me, but the paranoid part of me thinks that requirement could be manipulated and corrupted. Even so, that would only give you a pool to select from. It doesnt decide who gets which position. As far as having peer selection, that would be very vulnerable to turning into a good ole boy network.
Peer selected is also a possibility, as well as passing a law exam, like the bar but for judges.
Passing an exam sounds good to me, but the paranoid part of me thinks that requirement could be manipulated and corrupted. Even so, that would only give you a pool to select from. It doesnt decide who gets which position. As far as having peer selection, that would be very vulnerable to turning into a good ole boy network.