Part 2: Criminal liability for vehicle use Chapter 1: Legal position of the user-in-charge Section 52: Interpretation
This section explains that certain definitions set out in section 44 in Part 1 also apply to this Chapter of Part 2.  It also clarifies the meaning of the "relevant day" mentioned in section 50 and that any conduct giving rise to liability to a penalty charge is to be regarded as amounting to an offence.