127. If a risk assessment indicates that there are workstations within the place of work where employees are likely to be exposed to noise above 85dB(A), an employer shall—

(a) display mandatory warning signs, in accordance with Chapter 1, Part 7, to convey information that—

(i) the noise levels at those workstations are likely to exceed that upper exposure action value, and

(ii) hearing protectors are available and must be worn, and

(b) ensure that the workstations are protected from unauthorised access by barriers or other suitable means that are technically feasible and justified by the risk of exposure.