Whenever any manager, agent or employee does or omits to do an act which it had been his or her task to do or to refrain from doing on behalf of the employer and which would be an offence under any provision listed in Schedule 3 for the employer to do or omit to do, and the act or omission of the manager, agent or employee occurred because the employer failed to take all reasonable steps to prevent the act or omission in question, then
the employer shall be guilty of the said offence and, save that no penalty other than a fine may be imposed if a conviction is based on this subsection, liable on conviction to the penalty specified in the relevant law, including an order under subsections (2), (3) and (4), and proof of such act or omission by a manager, agent or employee
shall constitute prima facie evidence that the employer is guilty under this subsection.
