49 C.F.R. § 209.203 – Notice of investigation.

(a) FRA begins a compliance order proceeding by serving a notice of investigation on the respondent.
(b) The notice of investigation contains:
1. (1) A statement of the legal authority for the proceeding;
2. (2) A statement of the factual allegations upon which the remedial action is being sought; and
3. (3) A statement of the remedial action being sought in the form of a proposed compliance order.
(c) The FRA may amend the notice of investigation at any time prior to the entry of a final compliance order. If an amendment includes any new material allegation of fact or seeks new or additional remedial action, the respondent is given an opportunity to respond.