Sch 20B para 6
(1) After a person to whom paragraph 4 applies (but to whom section 247A does not apply) has served one-half of the sentence, the Secretary of State must, if directed to do so by the Board, release the person on licence under this paragraph. (2) The Board must not give a direction under sub-paragraph (1) unless the Board is satisfied that it is no longer necessary for the protection of the public that the person should be confined. (3) If the person is serving a section 85 extended sentence, the reference in sub-paragraph (1) to one-half of the sentence is a reference to one-half of the custodial term. (4) Sub-paragraphs (1) to (3) apply in place of section 244 (release on licence of prisoners serving 12 months or more). (5) Paragraphs 38 and 39 contain provision that relates to the Board's function of giving directions under sub-paragraph (2) for the release of a person.