Ann: Results of Extraordinary General Meeting, page-14

Re foreign withholdibg tax, it's not a good answer... here from ATO website.

"In most circumstances, you will be liable to pay Australian income tax on the dividend. You must include the full amount of the dividend at item 20 Foreign source income and foreign assets or property on your Tax return for individuals (supplementary section) 2020. This means the amount you are paid or credited plus the amount of any foreign tax which has been deducted. You may be able to claim a foreign income tax offset for the foreign tax paid'.

You'll need get advice, but it should end up with you paying tax on what you actually received, with no franking credit, as PNG is not part of Australia's imputation system.