...what an adjustment it's going to be (if DJ's calcs are anything to go by).
Any increases in e-toll tariffs may not exceed the CPI averaged over the previous 12 months according to Government Gazette No. 36912
Adjustment of tariffs and amounts
5.21
The tariffs and amounts displayed in this notice may be adjusted by a determination
of the Minister on 1 March of each year: Provided that such adjustment shall not exceed the
Consumer Price Index calculated for the preceding 12 months.
Of course regulations can easily be changed ...