An employer or self-employed person shall ensure that -
(a) in any workplace or part of such workplace under his or her control, where the exposure to noise is at or above the noise-rating limit, that workplace or part thereof is zoned as a noise zone;
(b) a noise zone is clearly demarcated and identified by a notice indicating that the relevant area is a noise zone and that hearing protective equipment as contemplated in regulation 12 must be worn;
(c) no person enters or remains in a noise zone unless he or she wears the required hearing protective equipment; and
(d) the reason why noise exposure is at or above the noise-rating limit is identified and that action is taken, as soon as is reasonably practicable, by means other than the use of hearing protective equipment, to lower the noise level so that it is not at or above the noise-rating limit.