Asked on Monday why no personnel would be on the border checkpoints, Prime Minister Scott Morrison said: "That's not something the Defence Force is doing any longer."
Speaking on Wednesday morning from a police base camp at Cann River, where about 100 tents have been pitched, Deputy Commissioner Rick Nugent acknowledged the logistical operation was significant.
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The border was closed for part of the year by NSW authorities and Mr Nugent said police were working to mirror the checkpoint locations they used.
"This is quite different, from our perspective, because this is the first time Victoria Police has actually closed the borders," he said.