Wild Life (Protection) Act, 1972
(1) The Chief Wild Life Warden may, on application, grant to any person a permit to enter or reside in a sanctuary for all or any of the following purposes, namely:-
(a) investigation or study of wild life and purposes ancillary or incidental thereto;
(c) scientific research;
(e) transaction of lawful business with any person residing in the sanctuary.
(2) A permit to enter or reside in a sanctuary shall be issued subject to such conditions and on payment of such fee as may be prescribed.