Section 14

Any provision contained in a contract of service or apprenticeship, or in an agreement collateral thereto (including a contract or agreement entered into before the coming into force of this Ordinance) shall be void in so far as it would have the effect of excluding or limiting any liability of the employer in respect of personal injuries caused to the person employed or apprenticed by the negligence of persons in common employment with him.

For the purpose of this section "personal injury" includes any disease and any impairment of a person's physical or mental condition, and the expression "injured" shall be construed accordingly.