This section applies where a court makes a detention and training order.
If the offender—
is subject to a relevant sentence of detention (see section 248), and
has not at any time been released under Chapter 6 of Part 12 of the Criminal Justice Act 2003 (release on licence of fixed-term prisoners),
the court may order that the detention and training order is to take effect at the time when the offender would otherwise be released under that Chapter.
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If the offender is subject to a further period of detention imposed—
under paragraph 3(2)(a) of Schedule 12 (breach of supervision requirement of existing detention and training order),
under section 104(3)(a) of the Powers of Criminal Courts (Sentencing) Act 2000, or
under either of those provisions by virtue section 213 of the Armed Forces Act 2006,
the court may order that the detention and training order is to take effect at the end of the further period of detention.