petitioner issued a communication to the 2nd respondent dated 07.10.2017, evident from Ext.P2. In Ext.P2, petitioner brought to the notice of the authorities that there is an anomaly with respect to clause “B.20 Taxes” in the special conditions of contract. The Special Conditions of Contract is produced as Ext.P3. It is also brought to the notice of respondents 1 and 2 that, if the said clause is not varied, it may create hurdle on bill processing, for the reason that, for the manufacture of pre stress concrete poles, the rawmaterials required are cement, steel, coarse aggregates and fine aggregates. When the petitioner sells the PSC Poles to the Board, then GST is imposed, which is known as output GST. When the raw-materials are purchased, there is input credit of GST. However, the GST incurred by the petitioner at the time of purchase of the raw-materials shall be adjusted towards GST payable at the time of sale of Poles and net amount shall be paid to the Government. So also, the input tax credit varies from time to time based on the cost of raw-materials. It was highlighting the said aspect, Ext.P2 letter was issued. However, without hearing the petitioner, the Board issued Ext.P4 corrigendum dated 19.10.2017, informing that, no