(2) This section applies to any industrial undertaking which (i) is not formed by the splitting up, or the reconstruction of, business already in existence or by the transfer to a new business of building, machinery or plant, previously used in any other business; (ii) has begun or begins to manufacture or produce articles in any part of taxable territories at any time within a period of thirteen years from the 1st day of April 1948, or such further period as the Central Govern ment may, by notification in the Official Gazette, specify with reference to any partic ular industrial undertaking; (iii) employs ten or more workers in a manufacturing process carried on with the aid of power, or employs twenty or more workers in a manufacturing process carried on without the aid of power; Provided that the Central Government may, by notifica tion in the Official Gazette, direct that the exemption conferred by this section shall not apply to any particular industrial undertaking.