(1) A person who is sentenced to detention in a detention centre for a period must not be detained:
(a) if the period exceeds 7 days--in a unit detention centre; or
(b) if the period exceeds 14 days--in an area detention centre.
(2) For the purposes of subsection (1):
(a) if a detainee is sentenced to 2 or more concurrent periods of detention--the period of detention is taken to be the longer or longest of those periods; or
(b) if a detainee is sentenced to 2 or more periods of detention to be served consecutively--the period of detention is taken to be equal to the sum of those periods.