(1)A person detained in a young offenders institution in pursuance of a sentence shall, where the term of his detention is six months or more, after his release and until the expiration of a period of twelve months from the date of his release, be required to be under the supervision of such person as may be specified in the notice to be given to him by the Secretary of State on his release, and shall, while under that supervision, comply with such other requirements as may be so specified :
Provided that the Secretary of State may, at any time, modify or cancel any of the said requirements or order that a person who is under supervision as aforesaid shall cease to be under supervision.
(2)The Secretary of State may by order extend the provisions of the last foregoing subsection to persons detained as aforesaid whose term of detention is less than six months but not less than three.
(3)If before the expiration of the said period of twelve months the Secretary of State is satisfied that a person under supervision under subsection (1) of this section has failed to comply with any requirement for the time being specified in the notice given to him under that subsection, he may by order recall him to a young offenders institution; and thereupon he shall be liable to be detained in that institution, and if at large he shall be deemed to be unlawfully at large :
Provided that any such order shall, at the expiration of the said period of twelve months, cease to have effect unless the person to whom it relates is then in custody thereunder.
(4)The period for which a person may be detained under the last foregoing subsection shall not exceed three months.
(5)The Secretary of State may, at any time, release a person who is detained under this section; and the provisions of this section shall apply in the case of a person so released subject to the following modifications:—
(a)the period referred to in subsection (1) shall be calculated from the date of his original release; and
(b)the period during which he shall be liable to be detained on further recall shall be the period referred to in subsection (4) reduced by any time during which he has previously been detained under this section.