(1) Despite anything to the contrary in this Act or any other Act (other than the Sentencing Act 1991 or the Charter of Human Rights and Responsibilities), every sentence of imprisonment imposed on a child or young person by a court, as from the date of its commencement, must be served concurrently with any uncompleted sentence or sentences of detention in a youth justice custodial centre imposed on that child or young person, whether before or at the time the relevant sentence was imposed, unless otherwise directed by the court at the time of pronouncing the sentence.
(2) If the court directs that a sentence of imprisonment be served cumulatively on any uncompleted sentence or sentences of detention in a youth justice custodial centre, service of the sentence of detention must be suspended until the child or young person has served the sentence of imprisonment.