; (iii) specify that such attendance and testimony are necessary to the conduct of the investigation; (iv) notify the person receiving the demand of the right to be accompanied by an attorney and any other representative; and (v) describe the general purpose for which the demand is being issued and the general nature of the testimony, including the primary areas of inquiry, which will be taken pursuant to the demand. (2) Product of discovery Any civil investigative demand issued under this section which is an express demand for any product of discovery shall not be returned or returnable until 20 days after a copy of such demand has been served upon the person from whom the discovery was obtained. (3) Date The date prescribed for the commencement of oral testimony pursuant to a civil investigative demand issued under subsection (a) shall be a date which is not less than 7 days after the date on which demand is received, unless the Attorney General or the Attorney General’s designee determines that exceptional circumstances are present which warrant the commencement of such testimony within a lesser period of time. (4) Notification The Attorney General shall not authorize the issuance under this section of more than one civil investigative demand for oral testimony by the same person unless the person requests otherwise or unless the Attorney General, after investigation, notifies that person in writing that an additional demand for oral testimony is necessary. (c) Protected material or information (1) In general A civil investigative demand issued under subsection (a) may not require the production of any documentary material, the submission of any answers to written interrogatories, or the giving of any oral testimony if such material, answers, or testimony would be protected from disclosure under— (A) the standards applicable to subpoenas or subpoenas duces tecum issued by a court of the United States in aid of a grand jury investigation