(1)  If an employee or agent contravenes any provision of this Act, the employer or the principal of the agent is taken to have contravened the same provision.

(2)  It is a defence in proceedings against an employer or principal for such a contravention if it is proved that the employer or principal could not, despite taking all reasonable precautions and exercising all due diligence, prevent the contravention.

(3)  An employer or principal may be proceeded against and convicted under a provision pursuant to this section whether or not the employee or agent has been proceeded against or been convicted under that provision.