ugggh! I have had the exact same problem. This is why I hated this section of the course so much, there's a lot of ambiguity over stuff like that.
I see the abiltiy to provide a fair and unbiased hearing being the sole result of reflecting prevailing rights in procedures. I reccon they're the exact same thing... You'll probably do better if you come up with two different examples. It's not that difficult, you could refference Koori court and sexual offences list for one, and something like bail and burden/standard of proof for the other... the examiners will probably like you more if you do that rather than repeating an example.
I reccon that the questions about effective legal system require you ot just pick various bits of the course and talk them up or talk them down.