You have an adjustment for a supply for which you are liable to pay GST (or would be liable to pay GST if it were a * taxable supply) if:
(a) in relation to the supply, one or more * adjustment events occur during a tax period; and
(b) GST on the supply was attributable to an earlier tax period (or, if the supply was not a taxable supply, would have been attributable to an earlier tax period had the supply been a taxable supply); and
(c) as a result of those adjustment events, the * previously attributed GST amount for the supply (if any) no longer correctly reflects the amount of GST (if any) on the supply (the corrected GST amount ), taking into account any change of circumstances that has given rise to an adjustment for the supply under this Subdivision or Division 21 or 134.