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Lighting. 
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12.—(1) Effective provision shall be made for securing and maintaining sufficient and suitable lighting, whether natural or artificial, in every part of an office in which persons are working or passing. 
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(2) The Minister, after consultation with the Minister for Health, may, by regulations, prescribe a standard of sufficient and suitable lighting for offices or for any class or description of office or parts thereof or for any kind of clerical work. 
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(3) All glazed windows and skylights used for the lighting of rooms shall, so far as practicable, be kept clean on both the inner and outer surfaces and free from obstruction. 
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(4) Subsection (3) shall not affect the whitewashing or shading of windows and skylights for the purposes of mitigating heat or glare or the reasonable use of protective or translucent screens. 
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(5) So far as is reasonably practicable arrangements shall be made so that there is not, by reason of— 
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(a) the brightness of the light, or 
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(b) unsuitable shading, or 
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(c) unsuitable placing of light sources or positions of work, 
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discomfort or injury from glare or from reflection of light into the eyes of the worker. 
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