154. Property vested in His Majesty for purposes of the government of the Federation shall, save in so far as any Federal law may otherwise provide, be exempt from all taxes imposed by, or by any authority within, a Province or Federated State: Provided that, until any Federal law otherwise provides, any property so vested which was immediately before the commencement of Part III of this Act liable, or treated as liable, to any such tax, shall, so long as that tax continues, continue to be liable, or to be treated as liable, thereto.
