to the custodian. (12) Separate answers Each reporting requirement or question in a civil investigative demand shall be answered separately and fully in writing under oath, unless it is objected to, in which event the reasons for the objection shall be stated in lieu of an answer, and it shall be submitted under a sworn certificate, in such form as the demand designates, by the person, if a natural person, to whom the demand is directed or, if not a natural person, by any person responsible for answering each reporting requirement or question, to the effect that all information required by the demand and in the possession, custody, control, or knowledge of the person to whom the demand is directed has been submitted. (13) Testimony (A) In general (i) Oath and recordation The examination of any person pursuant to a demand for oral testimony served under this subsection shall be taken before an officer authorized to administer oaths and affirmations by the laws of the United States or of the place at which the examination is held. The officer before whom oral testimony is to be taken shall put the witness on oath or affirmation and shall personally, or by any individual acting under the direction of and in the presence of the officer, record the testimony of the witness. (ii) Transcription The testimony shall be taken stenographically and transcribed. (B) Parties present Any Agency investigator before whom oral testimony is to be taken shall exclude from the place where the testimony is to be taken all other persons, except the person giving the testimony, the attorney for that person, the officer before whom the testimony is to be taken, an investigator or representative of an agency with which the Agency is engaged in a joint investigation, and any stenographer taking such testimony. (C) Location The oral testimony of any person taken pursuant to a civil investigative demand shall be taken in the judicial district of the United States in which such person resides, is found, or transacts business, or in such