On and from the commencement of section 755 —
(a) a remand centre established under section 478(a) of the Children, Youth and Families Act 2005 , as in force immediately before that commencement, is taken to be a youth justice custodial centre established under section 755; and
(b) a youth residential centre established under section 478(b) of the Children, Youth and Families Act 2005 , as in force immediately before that commencement, is taken to be a youth justice custodial centre established under section 755; and
(c) a youth justice centre established under section 478(c) of the Children, Youth and Families Act 2005 , as in force immediately before that commencement, is taken to be a youth justice custodial centre established under section 755.