(1) An accused has a criminal lifestyle if (and only if) the offence (or any of the offences) concerned satisfies any of these tests -
(a) it is specified in Schedule 4;
(b) it constitutes conduct forming part of a course of criminal activity;
(c) it is an offence committed over a period of at least six months and the accused has benefited from the conduct which constitutes the offence.
(2) Conduct forms part of a course of criminal activity if the accused has benefited from the conduct and -
(a) in the proceedings in which he was convicted he was convicted of three or more other offences, each of three or more of them constituting conduct from which he has benefited, or
(b) in the period of six years ending with the day when those proceedings were instituted (or, if there is more than one such day, the earliest day) he was convicted on at least two separate occasions of an offence constituting conduct from which he has benefited.
(3) But an offence does not satisfy the test in subsect
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