law: 8. Mercantile Marine Department.-
  (1) The Central Government may establish and maintain at each of the ports of Bombay, Calcutta and Madras and at such other port in India as it may consider necessary an office of the Mercantile Marine Department for the administration of this Act and the rules and regulations thereunder.
  (2) The office of the Mercantile Marine Department at the port of Bombay, Calcutta or Madras shall be in the charge of a principal officer, and the office at any other port shall be in the charge of such officer as the Central Government may appoint in this behalf.
  (3) In the discharge of their duties, the principal officer and other officers shall be subject to the control of the Director-General.