https://www.abc.net.au/news/2021-09-16/legal-action-victoria-electric-vehicle-tax-high-court/100466904

Drivers are challenging Victoria's electric vehicle tax, arguing it may be unconstitutional

Victoria introduced the levy in July, which charges road users based on how much they travel. Electric vehicle drivers are charged between 2-2.5 cents per kilometre.
Lawyers representing two drivers have filed documents with the High Court, arguing Victoria does not have constitutional power to introduce the tax.
"Our argument will be in the High Court that this is essentially a tax on consumption, and a tax on consumption is a tax that only the federal government can levy," he said.