Tax Laws Amendment (2011 Measures No. 7) Act 2011 (147 of 2011)
4 Amendment of assessments
Section 170 of theIncome Tax Assessment Act 1936 does not prevent the amendment of an assessment if:
(a) the assessment was made before the commencement of Schedule 1 (about special disability trusts) to this Act; and
(b) the amendment is made within 2 years after that commencement; and
(c) the amendment is made for the purpose of giving effect to that Schedule.