From customs.gov.au
These are the same times and location as detailed in the op.
Advice to International Travellers
Passengers travelling on international flights are advised to go to the airport early and after check-in should proceed directly to Customs and Immigration for processing.
Disruptions are expected to affect both arriving and departing passengers at international airports and will occur as follows:
Update 1: As at 10am Monday 26 September
Sydney International Airport
Tuesday 27 September
Delays are to be expected throughout the day. Stoppages will be in place from:
6am – 9am
7pm – 8pm
Thursday 29 September
Delays are to be expected throughout the day. Stoppages will be in place from:
6am – 9am
7pm – 8pm
Saturday 1 October
Delays are to be expected throughout the day. Stoppages will be in place from:
6am – 9am
7pm – 8pm
Melbourne International Airport
Tuesday 27 September
Delays are to be expected throughout the day. Stoppages will be in place from:
7am -8am
3pm – 4pm
9pm – 10pm
Brisbane International Airport
Tuesday 27 September
Delays are to be expected throughout the day. Stoppages will be in place from:
7am - 8am
7.30pm – 8.30pm
Adelaide International Airport
Tuesday 27 September
Delays are to be expected throughout the day. Stoppages will be in place from:
6.30am – 8.30am
Perth International Airport
Tuesday 27 September
Delays are to be expected throughout the day. Stoppages will be in place from:
1.30pm - 3.30pm
11pm – 1am Wednesday 28 September
Cairns International Airport
Tuesday 27 September
Delays are to be expected throughout the day due to overtime bans which affect all incoming and outgoing flights.
Saturday 1 October
Delays are to be expected throughout the day. All incoming and outgoing flights will be affected from 5pm until 2am Sunday 2 October.
These are the same times and location as detailed in the op.