(1)  A drug treatment order has –

(a) a custodial part; and

(b) a treatment and supervision part.

(2)  The custodial part consists of the sentence of imprisonment imposed under section 27F .

(3)  The treatment and supervision part consists of –

(a) the core conditions attached under section 27G ; and

(b) the program conditions attached under section 27H .

(4)  The treatment and supervision part operates until it is cancelled under section 27L , 27O or 27Q .

(5)  However, section 27R applies if the treatment and supervision part is not, within 2 years after the making of the drug treatment order, cancelled under section 27L , 27O or 27Q .