(4)Notwithstanding anything contained in the foregoing sub-section, -(a)the Mayor, if the municipal area is within the jurisdiction of a Municipal Corporation, or the President, if the municipal area is within the jurisdiction of a Municipal Council or a Nagar Panchayat and in the absence of the Mayor or the President, as the case may be, the Chief Officer may, forthwith or with such notice, as he thinks fit, demolish, repair or secure or cause to be demolished, repaired or secured, any such wall or building or thing affixed thereto, on the report of the Municipal Architect or where there is no Municipal Architect, on the report of the Municipal Engineer, or in his absence, the Municipal Town Planner, certifying that such demolition, repair or securing of the building, wall or thing, is necessary for the safety of the public or the inmates of the building;(b)in any such case the Chief Officer may, cause the inmates of the building to be summarily removed from the same or such portion thereof, as he may consider necessary; and(c)all expenses incurred by the Municipality in taking action under this sub-section, shall be paid by the owner of such wall, building or thing.