(1) The provisions of this Chapter shall apply to every industrial establishment wherein three hundred or more than three hundred workers, are employed, or were employed on any day of the preceding twelve months. (2) Notwithstanding anything contained in sub-section (1), the provisions of this Chapter shall not apply to an industrial establishment in so far as the workers employed therein are persons to whom the Fundamental and Supplementary Rules, Civil Services (Classification, Control and Appeal) Rules, Civil Services (Temporary Service) Rules, Revised Leave Rules, Civil Service Regulations, Civilians in Defence Service (Classification, Control and Appeal) Rules or the Indian Railway Establishment Code or any other rules or regulations that may be notified in this behalf by the appropriate Government, apply.