The rule for status based access in that reference is:

Enjoy exclusive access to premium airport lounges around the world with oneworld Emerald or Sapphire frequent flyer tier status. Members of oneworld airline frequent flyer programmes with the equivalent of oneworld Emerald or Sapphire tier status can use lounges offered by oneworld airlines when departing on any flight marketed and operated by any oneworld member airline, regardless of cabin class being flown (exceptions are noted below).

Emerald tier frequent flyers can use First Class, Business Class or frequent flyer lounges.

So Qantas are still making things up or have opted out of Oneworld rules for their lounges. The exceptions have to do with lounge memberships.