"people can still BPAY today, or tomorrow" ... and maybe, but I...

"people can still BPAY today, or tomorrow"

... and maybe, but I wouldn't push my luck past tomorrow (Friday 28^th), Monday 31^st of next week.

Note that ability to exercise EXPIRES AT 5.00PM (WST) ON 31 December 2018

which is at 8 pm Oz Eastern Summer Time as eastern Oz is currently on night-time wasting.

but there is a catch as a close reading of

https://www.commbank.com.au/support.banking.explain-bpay-payment.html

"If your payment is made on a bank business day before 6pm (Sydney / Melbourne time) it will be debited from your account instantly and processed that day. The biller will acknowledge the payment as having been made that day and should process the payment the next banking business day."

suggests to me that perhaps the effective deadline for payment using BPAY via CommBank is 6 pm Monday 31st, Australian Eastern Summer Time

... but I would exercise tomorrow, Friday, before 6 pm Australian Eastern Summer Time at latest.

You may need to check past posts to see how to exercise, one way being

https://hotcopper.com.au/threads/ann-option-expiry-notice.4560347/#post-36840885

while another is to get a reference number* by ringing Automic and use this with BPAY together with Biller Code: 235812.

* If you have already exercised options for a trading account and wish to exercise more for the same trading account you should use the same reference number (and I suggest debiting the same account - I used my CDIA on three occasions and it worked twice, with one in process).

DYOR - no responsibility is accepted for the above advice, which is given in good faith.

Have a happy new year.