(1) On the receipt of a notice under section 38 of the occurrence of an accident resulting in loss of human life or grievous hurt causing total or partial disablement of permanent nature to a passenger, the Commissioner shall, as soon as may be, notify the metro 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 be after the occurrence of the accident, he shall notify the metro railway administration accordingly.