Australia rule is zung jung rule, except that chicken hand is not allowed in Australia rule.

Hey, just tried an Australia rules game, and it still allowed chicken hand. I think it's because the minimum score is set to 1, and chicken hand is a 1-point hand (in your Zung Jung rule set, it's set to 0, which allows chicken hand also, because the zero minimum score allows the 1-point chicken hand).

I think if you switched the Australia rules minimum point value to 2, it would fix it.

changed the minimum point, thanks Aether!