306. Notwithstanding anything in this Constitution, Parliament shall, during a period of five years from the commencement of this Constitution, have power to make laws with respect to the following matters as if they were enumerated in the Concurrent List, namely:-
(a) Trade and commerce within a State in, and the production, supply and distribution of, cotton and woollen textiles, paper (including newsprint), foodstuffs (including edible oil-seeds and oil), petroleum and petroleum products, spare parts of mechanically propelled vehicles, coal, iron, steel and mica
(b) Relief and rehabilitation of displaced persons;
(c) Offences against laws with respect to any of the matters mentioned in clauses (a) and (b) of this article, inquiries and statistics for the purposes of any of those matters, jurisdiction and powers of all courts except the Supreme Court with respect to any of those matters, and fees in respect of any of those matters but not including fees taken in any court; but any law made by Parliament, which Parliament would not but for the provisions of this article have been competent to make, shall to the extent of the incompetency cease to have effect on the expiration of the said period except as respects things done or omitted to be done before the expiration thereof.