I´ve beeing following along for two years now, but now I feel I...

I´ve beeing following along for two years now, but now I feel I should use my votes to try to achieve a change and at least try to prevent AS to stuff his pockets with even more "performance" shares.
But how can we share holders from Germany vote online ? In the announcement it says we either need a Holder Identification Number (HIN) or a SecurityholderReference Number (SRN) to identify as share holder.
How do we obtain these numbers or where do we get it? If using a German broker, will they organize it or do we have to contact Australian authorities for that?

Thank you