Section 279(2) in The New Delhi Municipal Council Act, 1994
(2)If any of the person upon whom a notice has been served under sub-section (1) appears in pursuance thereof before the Chairperson and gives an undertaking to him that such person shall, within a period specified by the Chairperson, execute such works of improvement in relation to the building as will, in the opinion of the Chairperson, render the building fit for human habitation or an undertaking that the building shall not be used for human habitation until the Chairperson on being satisfied that it has been rendered fit for that purpose, cancels the undertaking, the Chairperson shall not make an order of demolition of the building.