Note 12 - Contingent Liabilities and Contingent assets, page-11

This is interesting: Platinum went to trouble  to negotiate Extension of these options.
The 18.6 US cents in August are looking  bit sick. That would be about 25 AU cents

Options to Suppliers
• On 27 August 2014, 15,000,000 options were issued to
Platinum Partners at US$ 0.186 expiring on 27 August
2018, under the extension agreement.
• On 6 February 2015, 25,000,000 options were issued to
Platinum Partners at US$ 0.101 expiring on 6 February​

2019, under the extension agreement.