The latest turn in the section 18 C debate has come from the leak that the Labor Party is keen to pursue a unified discrimination package, as was tried under Gillard. You may recall that this proposal, which explicitly involved reversal of the onus of proof, was attacked solidly by even establishment legal figures. Gillard backed down, but her champions remained in the party, ever keen to push this proposal.
The attempt to consolidate the five anti-discrimination packages will result in section 18 C style challenges on disability, gender, and who knows how many other politically correct attributes. The Gillard laws had a whole shopping list of 18 qualities, such as pregnancy, breastfeeding, sexual orientation, political opinion, nationality, citizenship, religion, gender identity, immigrant status, family responsibilities, and I cannot remember the rest. What a list! Imagine the lawsuits!