law: Railways Act, 1989
  114. Inquiry by Commissioner. 
  (1) On the receipt of notice under section 113 of the occurrence
  
  of an accident to a train carrying passengers resulting in loss of human life
  
  or grievous hurt causing total or partial disablement of permanent nature to a
  
  passenger or serious damage to railway property, the Commissioner shall, as
  
  soon as may be, notify the railway administration in whose jurisdiction the
  
  accident occurred of his intention to hold an inquiry into the causes that led
  
  to the accident and shall at the same time fix and communicate the date, time
  
  and place of inquiry : 
  Provided  that it shall be open to the Commissioner to
  
  hold an inquiry into any other accident which, in his opinion, requires the
  
  holding of such an inquiry.
  (2) If for any reason, the Commissioner is not able to hold an
  
  inquiry as soon as may he after the occurrence of the accident, he shall notify
  
  the railway administration accordingly.