I found this in a KPMG article, which backs up what has been said so far. Pity the IRD haven't made it easy to find on their website, but I guess their 2018 calculator will turn up in due course. Last year I think it was about early July, leaving less than a week to complete that part of the tax return so it could be filed on time.

Australian listed share exemptionFrom 1 April 2017, the exemption from the Foreign Investment Fund rules for certain Australian listed shares – Australian resident companies on the ASX All Ordinaries index – will be extended to all shares listed on the ASX.
The exemption also requires consideration of whether the share is in a “company” (as defined for Australian tax purposes), tax resident in Australia, and excludes stapled securities. Therefore, care will need to be taken when applying this wider exemption.