Sch 17 para 39
(1) Conduct constituting an alleged offence that occurred before the relevant commencement day may be taken into account for the purposes of this Schedule. (2) In this paragraph, the “ relevant commencement day ” means— (a) in a case where the alleged offence is an offence that is specified in Part 2 when this Schedule comes into force, the day on which this Schedule comes into force; (b) in a case where the alleged offence is an offence that is subsequently added to Part 2 (whether by order under paragraph 31 or otherwise), the day when the enactment adding that offence to Part 2 comes into force.