Where a person is convicted of an offence against a provision of the Traffic Acts specified in column 1 of Part I of Schedule 2 to this Act or regulations made under any such provision, the maximum punishment by way of fine or imprisonment which may be imposed on him is that shown in column 4 against the offence and (where appropriate) the circumstances or the mode of trial there specified.

Any reference in column 4 of that Part to a period of years or months is to be construed as a reference to a term of imprisonment of that duration.