26 CFR § 301.9000-1 - Definitions when used in §§ 301.9000-1 through 301.9000-6.
(a) IRS records or information means any material (including copies thereof) contained in the files (including paper, electronic or other media files) of the Internal Revenue Service (IRS), any information relating to material contained in the files of the IRS, or any information acquired by an IRS officer or employee, while an IRS officer or employee, as a part of the performance of official duties or because of that IRS officer's or employee's official status with respect to the administration of the internal revenue laws or any other laws administered by or concerning the IRS. IRS records or information includes, but is not limited to, returns and return information as those terms are defined in section 6103(b)(1) and (2) of the Internal Revenue Code (Code), tax convention information as defined in section 6105 of the Code, information gathered during Bank Secrecy Act and money laundering investigations, and personnel records and other information pertaining to IRS officers and employees. IRS records and information also includes information received, generated or collected by an IRS contractor pursuant to the contractor's contract or agreement with the IRS. The term does not include records or information obtained by IRS officers and employees, solely for the purpose of a federal grand jury investigation, while under the direction and control of the United States Attorney's Office. The term IRS records or information nevertheless does include records or information obtained by the IRS before, during, or after a Federal grand jury investigation if the records or information are obtained -
(1) At the administrative stage of a criminal investigation (prior to the initiation of the grand jury);
(2) From IRS files (such as transcripts or tax returns); or
(3) For use in a subsequent civil investigation.
(b) IRS officers and employees means all officers and employees of the United States appointed by, employed by, or subject to the directions, instructions, or orders of the Commissioner or IRS Chief Counsel and also includes former officers and employees.
(c) IRS contractor means any person, including the person's current and former employees, maintaining IRS records or information pursuant to a contract or agreement with the IRS, and also includes former contractors.
(e) A demand is any subpoena or other order of any court, administrative agency or other authority, or the Congress, or a committee or subcommittee of the Congress, and any notice of deposition (either upon oral examination or written questions), request for admissions, request for production of documents or things, written interrogatories to parties, or other notice of, request for, or service for discovery in a matter before any court, administrative agency or other authority.
(f) An IRS matter is any matter before any court, administrative agency or other authority in which the United States, the Commissioner, the IRS, or any IRS officer or employee acting in an official capacity, or any IRS officer or employee (including an officer or employee of IRS Office of Chief Counsel) in his or her individual capacity if the United States Department of Justice or the IRS has agreed to represent or provide representation to the IRS officer or employee, is a party and that is directly related to official business of the IRS or to any law administered by or concerning the IRS, including, but not limited to, judicial and administrative proceedings described in section 6103(h)(4) and (l)(4) of the Internal Revenue Code.
(g) An IRS congressional matter is any matter before the Congress, or a committee or subcommittee of the Congress, that is related to the administration of the internal revenue laws or any other laws administered by or concerning the IRS, or to IRS records or information.
(i) A testimony authorization is a written instruction or oral instruction memorialized in writing within a reasonable period by an authorizing official that sets forth the scope of and limitations on proposed testimony and/or disclosure of IRS records or information issued in response to a request or demand for IRS records or information. A testimony authorization may grant or deny authorization to testify or disclose IRS records or information and may make an authorization effective only upon the occurrence of a precedent condition, such as the receipt of a consent complying with the provisions of section 6103(c) of the Internal Revenue Code. To authorize testimony means to issue the instruction described in this paragraph (i).