The WA legislation sounds different to QLD...
Regarding the QLD border -
"The powers granted to the Chief Health Officer in a public health emergency are extensive."
"Although the final decision is made by the Chief Health Officer, the Premier is able to contribute information that the State Government considers relevant."
https://www.abc.net.au/news/2020-10-...harge/12753776
So in the QLD context at least, measures taken are unlikely to change regardless of the government of the day.
Given the calibre of our politicians, probably not a bad idea.