Multiple Car Tax

I've just bought a new car and have been caught by surprise with a so called 'Progressive Tax' (if that's not an Oxymoron, I'm Brad Pitt in disguise) on multiple cars registered at one address.

Truth is, the other cars registered at my address don't reside here as they belong to my leased property owner who lives in his new house a few suburbs away from here. Of course, it's also true that the owners don't live here either, as they leased the property to me.

This is perhaps a perfect example of unintended consequences from what is probably a tax designed to help reduce traffic congestion, but the reality here is somewhat different. I'm wondering if anybody in this Forum has knowledge about the application of this tax and whether there's any avenue for me to seek exemption.

All input, in particular referrals to possible sources of help, would be much appreciated.

Thanks,
Geoff