s 8 Detention or restriction deemed to be undergone during period of imprisonment
Where a person— (a) who is undergoing detention or restriction under section 6 or 7, is sentenced to any term of imprisonment under this Act or any other written law; or (b) has his period of detention or restriction extended under subsection 11A(1) whilst he is serving any such term of imprisonment, such detention or restriction or extended detention or restriction shall be deemed to be undergone concurrently with that term of imprisonment, and if upon completion of any such term of imprisonment, there still remains any unexpired portion of the detention or restriction period or of the extended detention or restriction period, he shall be required to be detained or restricted, as the case may be, for such unexpired portion thereof.