5. (1) If the Deputy Commissioner, on his own motion or on the complaint of or upon information received from anybody or a Local Authority, is satisfied after making such inquiry as he thinks fit, that a person is an unauthorised occupant, he may issue, in the prescribed manner, a notice directing such person to vacate the land, building or part thereof in his occupation within a period of thirty days from the date of service of the notice ¹[: Provided that the Deputy Commissioner may, where he is satisfied that thirty days' notice will not be in public interest, reduce the period of such notice to not less than seven days.] (2) If the person, against whom an order under sub-section (1) has been made, refuses or fails to vacate the land, building or part thereof in his occupation within the time fixed, then, notwithstanding anything contained in any other law for the time being in force, it shall be lawful for the Deputy Commissioner to enter upon such land, building or part thereof and recover khas possession of the same by evicting such person and by demolishing and removing structures, if any, erected or built by that person.