{"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":null,"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","machine_formats":{"json":"https://regulus.evalyn.ai/document/49-cfr-107-309.json","markdown":"https://regulus.evalyn.ai/document/49-cfr-107-309.md"},"app_url":"https://regulus.evalyn.ai/document/49-cfr-107-309","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.\n\n(b) A warning letter issued under this section includes:\n\n(1) A statement of the facts upon which the Associate Administrator bases its determination that the person has committed a probable violation;\n\n(2) A statement that the recurrence of the probable violations cited may subject the person to enforcement action; and\n\n(3) An opportunity to respond to the warning letter by submitting pertinent information or explanations concerning the probable violations cited therein.\n\n[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]","truncated":false,"body_characters":1142}