law: Factories Act, 1948 
  26. Casing of new machinery
  (1) In all machinery driven by power and installed in any
  
  factory after the commencement of this Act,- 
  (a) every set screw, bolt or key on any
  
  revolving shaft, spindle, wheel or pinion shall be so sunk, encased or
  
  otherwise effectively guarded as to prevent danger;
  (b) all spur, worm and other toothed or
  
  friction gearing which does not require frequent adjustment while in motion
  
  shall be completely encased, unless it is so situated as to be as safe as it
  
  would be if it were completely encased.
  (2) Whoever sells or lets on hire or, as agent of a seller or
  
  hirer, causes or procures to be sold or let on hire, for use in a factory any
  
  machinery driven by power which does not comply with the provisions of 47[sub-section
  
  (1) or any rules made under sub-section (3)], shall be punishable with
  
  imprisonment for a term which may extend to three months or with fine which may
  
  extend to five hundred rupees or with both.
   48  [(3) The State Government may make rules specifying
  
  further safeguards to be provided in respect of any other dangerous part of any
  
  particular machine or class or description of machines.]