727. Initial duty to release.

As soon as a person1:

  1.  

    (1)     who is serving a Criminal Justice Act 1967 sentence of imprisonment imposed before 1 October 19922;

  2.  

    (2)     whose sentence is for a term of more than 12 months3; and

  3.  

    (3)     who has not previously been released from prison on licence in respect of that sentence4,

has served two-thirds of the sentence5, it is the duty of the Secretary of State6 to release that person unconditionally7; and the Secretary of State must, if directed to do so by the Parole Board8, release on licence a person who falls within heads (1) to (3) above9, after