Effective provision shall be made for securing and maintaining, in every part of premises to which this Act applies in which persons are working or passing, sufficient and suitable lighting, whether natural or artificial.

The Minister may by regulations made as respects premises to which this Act applies, or any class of such premises, prescribe a standard of lighting conformity to which shall be obligatory and a sufficient compliance with the foregoing subsection.

All glazed windows and skylights used for the lighting of any part of premises to which this Act applies in which work, or through which pass, any of the persons employed to work in the premises shall, so far as reasonably practicable, be kept clean on both the inner and outer surfaces and free from obstruction ; but this subsection shall not affect the whitewashing or shading of windows or skylights for the purpose of mitigating heat or glare.

All apparatus installed at premises to which this Act applies for producing artificial lighting thereat in parts in which the securing of lighting is required by this section to be provided for shall be properly maintained.