Kylie,
The short answer is you will definitely have to reissue notices for those properties affected by the amendment back to the time they changed. The date of effect will depend upon your rating policy. The reason for this is that you haven’t rated in accordance with the correct valuations based on the SP & the VG.
A problem you may come across is if any of the properties have been sold since the UE’s were changed. For these properties you will only be able to rate from the date of settlement, again depending upon your rating policy.
Good luck
JT
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