Don't want to throw kero on this potential fire, but it would also be unwise to think it'll be ok. The (new) policy is still being drafted and I wouldn't underestimate these Labor S-o-B's.
If they go down the U.S. IRS path, sh!ts'll be trumps.
Forget about the 23AG & 91/180 day rules, (in all likelyhood these will change/disappear) only when the legislation is available for scrutiny will we know what we're up against.