A person purchases a
"non-investment residential property" only if—
(a) the property is a residential property; and
(b) either of the following has been assessed for the purchase—(i) a concession, under the Duties Act 2001 , chapter 2 , part 9 , for transfer duty;(ii) a concession, under the repealed Stamp Act 1894 , section 55A , for stamp duty.