After section 170--
insert--
'(1) This section, section 31(1)(c) and the note, and sections 31(2AA) and 49(2B) to (2D) expire on 31 March 2011.
'(2) However, before 31 March 2011, a regulation may extend the expiry to a stated day of not later than 31 March 2012.
'(3) Immediately before the expiry, this Act is amended as follows--
(a) section 31(2A), 'subsection (1)(a) or (b) or (2)'--
omit, insert--
'subsection (1) or (2)';
(b) section 49(1), 'subsections (2A) and (2B)'--
omit, insert--
'subsection (2A)';
(c) section 49(2A), 'Unless subsection (2B) applies, only'--
omit, insert--
'Only'.'.