Hopefully this explains things
https://www.asx.com.au/about/trading-hours.htm
"Overnight and overseas trades may be reported until 9:45 am, Sydney time. These trades must take place according to ASX Operating Rules."
"Brokers wishing to trade contact each other by telephone. ASX Market Rules ensure that trading takes place in an orderly fashion."
"Trading during the Adjust phase is referred to as overnight trading."
https://www.asx.com.au/documents/rules/Draft_ASX_Operating_Rules_procedures.pdf#page=20
"L1”, “L2”, “L3”, “L4”, “L5” and “LT” condition codes – Reporting of overnight transactions
