3. If on the expiry, whether before or after the commencement of this Ordinance, of the period of a lease in respect of any land or building of which the Government or a Local Authority is the lessor or on the determination of such lease on the ground of breach of any covenant or on the determination of such lease according to the terms and conditions of the lease or otherwise, the lessee refused or failed, or refuses or fails, to vacate that land or building and put the lessor into possession of the same, then, notwithstanding anything contained in any other law for the time being in force or in any contract, it shall be lawful for the Deputy Commissioner, on his own motion or on the complaint of or upon information received from anybody or a Local Authority, at any time after the expiry or determination of lease, to re-enter upon the demised land or building and recover khas possession thereof by evicting the lessee and by demolishing and removing structures, if any, erected or built thereon by the lessee: Provided that the Deputy Commissioner shall, before demolishing and removing any structures under this section, issue, in the prescribed manner, a notice on the lessee calling upon him to remove such structures within a period of thirty days from the date of service of the notice.