14 CFR § 300.2 - Prohibited communications.
(a) Basic requirement. Except as provided in paragraphs (c), (d) and (e) there shall be no substantive communication in either direction between any concerned DOT employee and any interested person outside DOT, concerning a public proceeding, until after final disposition of the proceeding, other than as provided by Federal statute or published DOT rule or order.
(b) Definitions. For purposes of this part:
(1) A “substantive communication” is any written or oral communication relevant to the merits of the proceeding.
(3) A “concerned DOT employee” is a DOT employee who is or may reasonably be expected to be directly involved in a decision which is subject to a public proceeding.
(4) A “public proceeding” is one of the following:
(ii) A rulemaking proceeding involving a hearing as described in paragraph (b)(4)(i) of this section or an exemption proceeding covered by this chapter. (Other rulemaking proceedings are covered by the ex parte communication policies of DOT Order 2100.6 and 49 CFR 5.19.)
(iii) A tariff filing after DOT has ordered an investigation or a complaint has been filed or docketed.
(v) Any other proceeding initiated by a docket filing, other than a petition for generally applicable rulemaking, after the filing in the docket of an identifiable written opposition to the initiating document.
(c) General exceptions. Paragraph (a) of this section shall not apply to the following:
(1) Informal communications between legal counsel, including discussions about stipulations and other communications considered proper in Federal court proceedings.
(2) Information given to a DOT employee who is participating in a hearing case on behalf of an office that is a party, to another DOT employee who is reviewing that work, or to his or her supervisors within that office.
(3) Communications made in the course of an investigation to determine whether formal enforcement action should be begun.
(4) Settlement discussions and mediation efforts.
(5) Information given at the request of a DOT employee acting upon a specific direction of DOT, in a case other than a hearing proceeding as described in paragraphs (b)(4) (i) and (ii) (a “nonhearing case”), where DOT has decided that emergency conditions exist and this section would otherwise prevent the obtaining of needed information in a timely manner.
(6) Information given at the request of a DOT employee in a tariff matter after a complaint is filed but before an investigation is ordered.
(7) Nonhearing cases that are to be decided within 30 days after the filing of the initiating document.
(8) Nonhearing cases arising under 49 U.S.C. 41731-42.
(9) In nonhearing cases, communications with other Federal agencies not exempted by paragraph (e) of this section, provided the agencies have not participated as parties in the proceeding by making filings on-the-record.
(10) Information given at the request of a DOT career employee in the course of investigating or clarifying information filed, or pursuant to a waiver granted to an applicant or other interested person, in docketed proceedings involving determinations of fitness and/or U.S. citizenship only, for that portion of the proceeding that precedes the issuance of a show-cause order or an order instituting a formal proceeding. Motions for such waivers and any answers shall be filed in the applicable docket in accordance with § 302.11 of the Department's Procedural Regulations (14 CFR 302.11) and served upon all parties to the proceeding.
(d) Status and expedition requests. Paragraph (a) of this section shall not apply to oral or written communications asking about the status, or requesting expeditious treatment, of a public proceeding. However, any request for expeditious treatment should be made in accordance with the Rules of Practice, particularly Rule 11, § 302.11 of this chapter.
(e) National defense and foreign policy. In nonhearing cases, paragraph (a) of this section shall not apply to communications concerning national defense or foreign policy matters, including international aviation matters. In hearing cases, any communications on those subjects that would be barred by paragraph (a) of this section are permitted if the communicator's position with respect thereto cannot otherwise be fairly presented, but such communications shall not be included as part of the record on which decisions must be made.
(f) Communications not considered. A communication in violation of this section shall not be considered part of a record, or included as available material, for decision in any proceeding.