law: Factories Act, 1948 
  23. Employment of young persons on dangerous machines 
  (1) No young person 44[shall be required or allowed
  
  to work] at any machine to which this section applies, unless he has been fully
  
  instructed as to the dangers arising in connection with the machine and the
  
  precautions to be observed and- 
  (a) has received sufficient training in work
  
  at the machine, or
  (b) is under adequate supervision by a person
  
  who has a through knowledge and experience of the machine.
  (2) Sub-section (1) shall apply to such machines as may be
  
  prescribed by the State Government, being machines which in its opinion are of
  
  such a dangerous character that young persons ought not to work at them unless
  
  the foregoing requirements are complied with.