§FMCSR.com
Current textIn force on March 11, 2026Source: eCFR

§ 366.6 Cancellation or change.

Current wording, effective January 17, 2017.

eCFR as of March 11, 2026 ↗
49 CFR § 366.6 — Cancellation or change.. Text in force on March 11, 2026. This wording effective January 17, 2017 to present. Source: eCFR as of March 11, 2026, https://www.ecfr.gov/on/2026-03-11/title-49/section-366.6. Retrieved from FMCSR.com, https://fmcsr.com/reg/366.6?asof=2026-03-11, on October 26, 2026. Unofficial compilation; verify against the official source.

(a) A designation may be canceled or changed only by a new designation made by the motor carrier, broker, or freight forwarder, or by the process agent or company filing a blanket designation in accordance with § 366.5. However, where a motor carrier, broker or freight forwarder's USDOT Number is inactive for at least 1 year, designation is no longer required and may be canceled without making another designation.

(b) A change to a designation, such as name, address, or contact information, must be reported to FMCSA within 30 days of the change.

(c) Whenever a motor carrier, broker or freight forwarder changes it name, address, or contact information, it must report the change to its process agents and/or the company making a blanket designation on its behalf in accordance with § 366.5 within 30 days of the change.

(d) Whenever a process agent and/or company making a blanket designation on behalf of a motor carrier, broker, or freight forwarder terminates its contract or relationship with the entity, it should report the termination to FMCSA within 30 days of the termination. If process agents and/or blanket agents do not keep their information up to date, FMCSA may withdraw its approval of their authority to make process agent designations with the Agency.

[80 FR 63706, Oct. 21, 2015]

Effective Date Note:

At 82 FR 5303, Jan. 17, 2017, § 366.6 was suspended, effective Jan. 14, 2017.

Amendment history

4 distinct wordings on file since Oct. 1, 1998
  1. Jan. 17, 2017 → presenteCFR, day-precisediff vs. previousviewing
    [80 FR 63706, Oct. 21, 2015]
  2. Oct. 1, 2016 → Jan. 17, 2017annual edition 2016diff vs. previous
    [55 FR 11197, Mar. 27, 1990. Redesignated at 61 FR 54707, Oct. 21, 1996; 62 FR 49940, Sept. 24, 1997]
  3. Oct. 1, 2013 → Oct. 1, 2016annual editions 2013–2015diff vs. previous
    [55 FR 11197, Mar. 27, 1990. Redesignated at 61 FR 54707, Oct. 21, 1996; 62 FR 49940, Sept. 24, 1997]
  4. Oct. 1, 1998 → Oct. 1, 2013annual editions 1998–2012
    [55 FR 11197, Mar. 27, 1990. Redesignated at 61 FR 54707, Oct. 21, 1996; 62 FR 49940, Sept. 24, 1997]

A new entry appears whenever the regulatory words change between government snapshots. Day-precise from the eCFR (2017 onward); before that, one snapshot per annual CFR edition (revised as of October 1). Bracketed citations are the Federal Register history printed with the section.