The tax periods that apply to you are each period of 3 months ending on 31 March, 30 June, 30 September or 31 December in any year, except to the extent that:
(a) an election is in force under section 27-10; or
(b) the Commissioner determines otherwise under this Division.
Note: Several provisions in Chapter 4 provide for different tax periods. In particular, Division 151 provides for annual tax periods.