law: Indian Ports Act, 1908
  62. Hoisting unlawful colors in port 
  (1) If any vessel belonging to 61[any citizen of
  
  India or common wealth citizen] sailing under 62[Indian or British
  
  colors], hoists, carries or wears, within the limits of any port subjects to
  
  this Act, any flag, jack, pennant or colors, the use whereof on board such
  
  vessel has been prohibited by the, Merchant Shipping Act, 1894 (57 & 58
  
  Vict., c. 60) or any other Statute now or hereafter to be in force, or by any
  
  proclamation made or to be made in pursuance of any such Statute, or by any of 63[the
  
  regulations] in force for the time being, the master of the vessel shall, for
  
  every such offence, be punishable with fine which may extend to fifty rupees.
  (2) Such fine shall be in addition to any other penalty
  
  recoverable in respect of such an offence.
  (3) The conservator of the port, or any officer of 64[the
  
  Indian Navy], may cater on board any such vessel and seize and take away any
  
  flag, jack, pennant or colors so unlawfully hoisted, carried or worn on board
  
  the same.