SEZ DTA Certificates signed by Preventive Officer - Goods and Services Tax - GST

Dear experts, We are filing GST refund application for supply to SEZ units without payment of GST. We attached the DTA certificates issued by SEZ units. The GST Officer disallows the DTA certificates signed by the preventive officer and insists that it should be signed only by the specified officer or the authorised officer only. The officer further says if the preventive officer signs the DTA certificate then the necessary authorisation letter should also be enclosed. Your views. Thanks.