From the comments under that page:
So…. (I haven’t looked in 5 years) when you move livestock there is paperwork that is required for tracking that shows where it was moved from and where it was moved to. So farm to auction yard, form. auction yard to meat works, form. The Meat and Livestock Association is the body that all the forms go to and until maybe a year or two ago the database part was a bit dated but there was still a process in place.
With the movement of livestock the drivers and transporters who do this dont exactly do cows one day and boxes of hand sanitiser the next, they only do livestock so they do know what they are doing. There is/was an invisible line near Rockhampton that required livestock crossing that line to go through a dip for ticks or something like that as I recall.
This camera suggests either A) there is livestock moving without traceability paperwork or B) there is a second or the line for biosecurity has moved from Rockhampton.
I am only curious enough to write this and move on because it’s not something I need to know anymore but we do have biosecurity built into livestock movements…. chickens do not have the same livestock requirements but they do have a smaller number of steps as there is no auction yard step and is more directly between producer and buyer.