I also got an invite to attend the SAT.
I'm in a state of panic now as the latest date on the list is 18th April, but it is sold out. Unfortunately as I don't live in Melbourne the 18th is the earliest I can get there.
Will they arrange further dates?
I spoke to CAE today regarding another question and I was told that it just has to be "late April". The previous email also advises that the latest date the invitations will be sent out is the 20th April, hence it doesn't make sense to have the last day as the 18th.
Desperately hoping there will further dates!