Sch 20B para 29
(1) Prison rules made by virtue of section 257 may include provision for applying any provisions of this Chapter, in relation to any person falling within sub-paragraph (2), as if the person had been awarded such number of additional days as may be determined by or under the rules. (2) A person falls within this sub-paragraph if— (a) the person was released on licence under section 60 of the 1967 Act before 1 October 1992 and the licence was in force on that date, or (b) the person was, on that date, serving a custodial sentence, and (in either case) the person has forfeited any remission of the sentence.