Saving.

Nothing is this Act shall render any person. Liable to be convicted of any offence in respect of anything done or omitted to be done by him, before the commencement of this Act, if such act or omission was not an offence under the relevant principal Act, but for the provisions of this Act nor shall any person in respect of such act or omission be subject to a penalty greater than that which could have been inflicted on him under the law in force immediately before such commencement.