Notwithstanding anything contained in section 3, the Central Government of the State of Assam may, by order, direct that during such period, not exceeding twelve months from the appointed day, as may be specified in the order, any law which immediately before the appointed day was in force in the scheduled areas, shall be deemed to have continued to be in force therein or any specified part thereof, and may further likewise direct that any law which would have extended to, or come into force in, the scheduled areas on the appointed day, shall not be deemed to have extended thereto or come into force therein or any specified part thereof.