(1)Subject to the provisions of this section, any profits and gains derived by an assessee from an industrial undertaking, which has begun or begins to manufacture or produce any article or thing on or after the 1st day of April, 1998 in any Integrated Infrastructure Development Centre or Industrial Growth Centre located in the North-Eastern Region (hereafter in this section referred to as the Industrial undertaking) shall not be included in the total income of the assessee.