Tax Laws Amendment (2012 Measures No. 6) Act 2013 (84 of 2013)
4 Amendment of assessments
Section 170 of the Income Tax Assessment Act 1936 does not prevent the amendment of an assessment if:
(a) the assessment was made before the commencement of this section; and
(b) the amendment is made within 2 years after that commencement; and
(c) the amendment is made for the purposes of giving effect to Part 1 of Schedule 1 (about the tax treatment of native title benefits) to this Act.