Correct Answer - Option 3 : The Energy Conservation Act, 2001
The Energy Conservation Act, 2001 (ACT NO. 52 OF 2001): An Act to provide for efficient use of energy and its conservation and for matters connected therewith or incidental thereto.
Short title, extent, and commencement:
(1) This Act may be called the Energy Conservation Act, 2001.
(2) It extends to the whole of India except the State of Jammu and Kashmir.
(3) It shall come into force on such date1 as the Central Government may, by notification in the Official Gazette, appoint; and different dates may be appointed for different provisions of this Act and any reference in any such provision to the commencement of this Act shall be construed as a reference to the coming into force of that provision.