3. (1) If, on the expiry, whether before or after commencement of this Act, of the period of any lease or license in respect of any land or building of which the Conservator is the lessor or licensor or on the determination of such lease or license on the ground of breach of covenant or in pursuance of the condition in the lease imposing any obligation on the lessee or the licensee to give up possession of the demised land or building in the event of such land or building being required for the purposes of the Conservator, the lessee or licensee refused or failed, or refuses or fails, to vacate and deliver vacant possession of such land or building to the Conservator, then, notwithstanding anything contained in any other law, for the time being in force, or any contract, the Conservator may, after giving him an opportunity of being heard, by notice, in writing, require such lessee or licensee to vacate and deliver vacant possession of such land or building to him and to remove structures, if any, erected or built thereon by him within such time as may be specified in the notice. (2) If the Conservator is satisfied, after making such inquiry as he may think fit, that a person is an unauthorised occupant of any land or building, he may, after giving him an opportunity of being heard, by notice, in writing, require such person to vacate such land or building, and deliver vacant possession thereof to him and to remove structures, if any, erected or built thereon by him, within such time as may be specified in the notice. (3) If any person, to whom a notice to vacate or to deliver vacant possession or to remove structures is served under sub-section (1) or sub-section (2) fails to comply with the notice, the Conservator shall take possession of such land or building and demolish such structures after the expiry of 30 days of the date of the service of the notice. (4) No person shall be evicted under sub-section (2) in between the sunset and the sunrise.