Imposition of roster system for tourist vehicles is not arbitrary. Tourism should be based on environmental friendly concept. Right to entry in the sanctuary is not absolute. The authorities are well within their right to regulate entry and impose the terms and conditions for entry and impose terms and conditions for entry in the sanctuary . [Forest Friendly Camps Pvt Ltd vs. State of Rajasthan . AIR 2002 Raj 214. P.P.Naolekar and A.C.Goyal. (JJ)]