( 1 ) THIS application is directed against three demolition orders passed by the Deputy Commissioner, Corporation of Calcutta for demolition of the unauthorised structure i. e. the 14 storied building at 174, Chittaranjan Avenue, Calcutta, on the ground that copies of the order made under Section 414 (3) of the Calcutta Municipal Act, 1951 were not served on these petitioners who are occupants of all these 13 floors of the aforesaid premises and also that there has been a non-compliance of the provisions of Sections 560 and 561 of the said Act, It has also been challenged that there has been a total violation of the principles of natural justice by refusing to give the petitioners who are seriously prejudiced and affected by the impugned orders of demolition dated 15-5-78 and 21-4-81 by not being given any opportunity of filing any objections against the purported orders and of denying any opportunity of hearing of their objections against those orders. On hearing orally the learned counsel for the petitioners ah interim order was made on 17-2-82 to the following effect. The respondents including the Corporation of Calcutta and/or its officers and servants were restr