(1)A detention and training order is available where a court is dealing with an offender for an offence if—
(a)the offender is aged under 18, but at least 12, when convicted,
(b)the offence is an imprisonable offence, and
(c)the court is not required to pass—
(i)a sentence of detention under section 250 (see section 249(2)), or
(ii)a sentence of detention during Her Majesty’s pleasure under section 259.
(2)For circumstances in which the court is required to impose a detention and training order, see—
(a)section 312 (minimum sentence for offences of threatening with weapon or bladed article);
(b)section 315 (minimum sentence for repeat offence involving weapon or bladed article).