(1)Persons appointed under any prescribed designation including a Special Commissioner of Sales Tax, an Additional Commissioner of Sales Tax, a Joint Commissioner of Sales Tax, a Deputy Commissioner of Sales Tax, an Assistant Commissioner of Sales Tax, a Sales Tax Officer and an Assistant Sales Tax Officer to assist the Commissioner under VAT Act shall, for the purpose of this Act, exercise such powers and discharge such functions as may be required, by or under this Act within such local area as assigned by the Commissioner under that Act.