Section 35(6) in The Wild Life (Protection) Act, 1972
(6)No person shall destroy, exploit or remove any Wild Life including forest produce from a National Park or destroy or damage or divert the habitat of any wild animal by any act whatsoever or divert, stop or enhance the flow of water into or outside the National Park, except under and in accordance with a permit granted by the Chief Wild Life Warden, and no such permit shall be granted unless the State Government being satisfied in consultation with the National Board that such removal of wild life from the National Park or the change in the flow of water into or outside the National Park is necessary for the improvement and better management of wild life therein, authorises the issue of such permit:Provided that where the forest produce is removed from a National Park, the same may be used for meeting the personal bona fide needs of the people living in and around the National Park and shall not be used for any commercial purpose.