of the property, as to how, the annual value/value of the property has been determined and what is the amount demanded by way of tax. Unless and until, the pre-assessment notice is issued giving full details, the owner of the property would not be in a position to submit an effective representation or objection. The impugned notices are classical example of non application of mind without furnishing the relevant particulars and to state that impugned notice is only a proposal to which the petitioners can object, is an empty formality. A person, who sends an objection or a person, who has called upon to give objection should be clearly informed as to what is the proposal. A vague proposal or a proposal bereft of details would not satisfy the requirements of an effective show cause notice. Therefore, the impugned notices have been issued merely as a formality and this has caused serious prejudice to the petitioner, in as much as they were kept in the dark as to what is the basis of demand and how the property has been assessed to tax and how the tax payable has been determined. As held by this Court, in several decisions the guidelines for assessing the market value as provided under the Tamil Nadu buildings (Lease and Rent Control) Act, 1960 should be applied while exercising power under Section 82 of the District Municipalities Act. It is not known as to how the vacant land tax has been calculated what is the land value adopted. Even knowing by the provisions of G.O.Ms.No.151 dated 20.08.2009, the Government Order stipulates upper and lower limits."