7(1)This paragraph applies to any offender who at the commencement of sections 1 to 15 above is serving a sentence of imprisonment which was passed on him when he was under 21 years of age.E+W
(2)The Secretary of State may from time to time direct that an offender to whom this paragraph applies is to be detained—
(a)in a youth custody centre; or
(b)in a remand centre.
(3)An offender to whom this paragraph applies shall be treated for the purposes of release and supervision as if he had been sentenced on the date when the sentence of imprisonment was imposed to an equal term of youth custody.