Can my landlord start charging me for utilities mid tenancy? (VIC)

Sup yall so im looking through a property details. It states that some of the utilities (gas water) is included in the rent cause there isnt a seperate meter for that. Now problem is they also said that theres a chance this may change during the tenancy if they add seperate meters one day.

That struck me as odd, im assuming that means like once the first contracts up they notify me I pay rent plus utilities seperate later on when I extend my lease yeah?

But like just on the off chance they meant mid-lease contract, that aint legal right? I aint too knowledgeable on this kinda stuff so I hope yall can help.

If you guys know the relevant laws please tell me and where I can go to sound my (hopefully only hypothetical) complaints.

Thanks yall