49 CFR §190.207

1. (a)Except as otherwise provided by this subpart, a Regional Director begins an enforcement proceeding by serving a notice of probable violation on a person charging that person with a probable violation of 49 U.S.C. 60101 et seq., 33 U.S.C. 1321(j), or any regulation or order issued thereunder.
2. (b)A notice of probable violation issued under this section shall include:
   1. (1)Statement of the provisions of the laws, regulations or orders which the respondent is alleged to have violated and a statement of the evidence upon which the allegations are based;
   2. (2)Notice of response options available to the respondent under § 190.208;
   3. (3)If a civil penalty is proposed under § 190.221, the amount of the proposed civil penalty and the maximum civil penalty for which respondent is liable under law; and
   4. (4)If a compliance order is proposed under § 190.217, a statement of the remedial action being sought in the form of a proposed compliance order.
3. (c)The Regional Director may amend a notice of probable violation at any time prior to issuance of a final order under § 190.213. If an amendment includes any new material allegations of fact, proposes an increased civil penalty amount, or proposes new or additional remedial action under § 190.217, the respondent will have the opportunity to respond under § 190.208.