# Warning letters.

- **operation:** document
- **citation:** 49 CFR 107.309
- **title:** Warning letters.
- **source type:** regulation
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** current
- **official:** true
- **published on:** Not available
- **effective on:** 2026-08-18
- **summary:** (a) The Associate Administrator may issue a warning letter to any person whom the Associate Administrator believes to have committed a probable violation of the Federal hazardous material transportation law, the Federal Water Pollution Control Act, or any provision of this subchapter, subchapter B o
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- **source url:** https://www.ecfr.gov/on/2026-08-18/title-49/section-107.309
**body:**

(a) The Associate Administrator may issue a warning letter to any person whom the Associate Administrator believes to have committed a probable violation of the Federal hazardous material transportation law, the Federal Water Pollution Control Act, or any provision of this subchapter, subchapter B of this chapter, subchapter C of this chapter, or any special permit issued thereunder.

(b) A warning letter issued under this section includes:

(1) A statement of the facts upon which the Associate Administrator bases its determination that the person has committed a probable violation;

(2) A statement that the recurrence of the probable violations cited may subject the person to enforcement action; and

(3) An opportunity to respond to the warning letter by submitting pertinent information or explanations concerning the probable violations cited therein.

[Amdt. 107-11, 48 FR 2651, Jan. 20, 1983, as amended by Amdt. 107-15, 51 FR 34986, Oct. 1, 1986; Amdt. 107-24, 56 FR 8621, Feb. 28, 1991; Amdt. 107-32, 59 FR 49131, Sept. 26, 1994; Amdt. 107-36, 61 FR 7183, Feb. 26, 1996; 66 FR 45377, Aug. 28, 2001; 84 FR 6947, Feb. 28, 2019]
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