Liability of employers and principals
20.—(1) Anything done by a person in the course of employment shall be treated for the purposes of these Regulations as also done by their employer, whether or not it was done with that employer’s knowledge or approval.
(2) Anything done by a person as agent for the employer with the authority of the employer shall be treated for the purposes of these Regulations as also done by the employer.
(3) In proceedings under these Regulations against any person in respect of an act alleged to have been done by an employee of that person, it shall be a defence for that person to prove that they took such steps as were reasonably practicable to prevent the employee from—
(a)doing that act; or
(b)doing, in the course of their employment, acts of that description.