49 C.F.R. § 209.615 – Hearing.

(a) When a hearing is requested and scheduled under § 209.613, a hearing officer designated by the Office of the Chief Counsel convenes and presides over the hearing. If requested by respondent, and if practicable, the hearing is held in the general vicinity of the place where the alleged violation occurred, at a place convenient to the respondent, or virtually. Testimony by witnesses shall be given under oath and the hearing shall be recorded verbatim.
(b) The presiding official may:
1. (1) Administer oaths and affirmations;
2. (2) Issue subpoenas as provided by § 209.7;
3. (3) Adopt procedures for the submission of evidence in written form;
4. (4) Take or cause depositions to be taken;
5. (5) Rule on offers of proof and receive relevant evidence;
6. (6) Examine witnesses at the hearing;
7. (7) Convene, recess, reconvene, and adjourn and otherwise regulate the course of the hearing;
8. (8) Hold conferences for settlement, simplification of the issues or any other proper purpose; and
9. (9) Take any other action authorized by, or consistent with, the provisions of this subpart pertaining to civil penalties and permitted by law that may expedite the hearing or aid in the disposition of an issue raised, therein.
(c) The Office of the Chief Counsel has the burden of providing the facts alleged in the demand letter and may offer such relevant information as may be necessary to inform the presiding officer fully as to the matter concerned.
(d) The respondent may appear and be heard on the respondent's own behalf or through counsel of the respondent's choice. The respondent or respondent's counsel may offer relevant information, including testimony, which they believe should be considered in defense of the allegations, or that may bear on the penalty proposed to be assessed, and conduct such cross-examination as may be required for a full disclosure of the material facts.
(e) At the conclusion of the hearing, or as soon thereafter as the hearing officer shall provide, the parties may file proposed findings and conclusions, together with supporting reasons.