Key legal question
Whether the appeal could be entered into despite non-payment of the required advance on costs.
Extracted holding
No. The appellant ignored the final deadline to pay the advance or prove timely payment, so the appeal had to be dismissed without entry.
Extracted reasoning
After a non-extendable grace period under threat of non-entry, the advance was neither paid in cash nor validly credited, triggering non-entry under the Federal Supreme Court Act.