Peak and Off-peak -will this tariff remain under smart meters?

When getting the new electricity meter installed we encountered the peak/off-peak tariff issue. We were asked by our electricity retailer, who promotes solar systems, to get a time switch installed so we could keep the off peak electrical boost to our solar hot water. This tended to suggest the peak/off-peak tariff is intact.
The installers of the PV system didn't know and veered off the issue when I talked to them. But this was before a large number of installs and changeovers to smart meters had begun. so I hope they might be more familiar with the issue now. The electricity company representative seemed to be the most knowledgeable and helpful over the issue, particularly in getting the smart meter installed after "discovering" the off-peak issue.
The Department of Primary Industries Smart Meters & My Electricity bill information indicates that some off-peak tariffs will remain  until time of use rates become available "Once time-of-use rates become available, all energy used in off-peak times can be charged at off-peak rates. Currently, only specific appliances can benefit from off-peak rates."  Hopefully Solar Hot Water is a specific appliance or my other half is going to lose his temper (again!).
BUT time will tell and it will be very interesting getting the first bill, for a number of reasons!
One of my colleagues received her bill recently and has generated $100 excess over the electricity used. She has a 1.5 KWh system with a smaller household (and possibly much greener) so we will be comparing notes over billing and performance.