49 CFR § 387.31 - Financial responsibility required.
(a) No motor carrier shall operate a motor vehicle transporting passengers until the motor carrier has obtained and has in effect the minimum levels of financial responsibility as set forth in § 387.33 of this subpart.
(b) Policies of insurance, surety bonds, and endorsements required under this section shall remain in effect continuously until terminated.
(1) Cancellation may be effected by the insurer or the insured motor carrier giving 35 days' notice in writing to the other. The 35 days' notice shall commence to run from the date the notice is transmitted. Proof of transmission shall be sufficient proof of notice.
(2) Exception. Policies of insurance and surety bonds may be obtained for a finite period of time to cover any lapse in continuous compliance.
(3) Exception. Mexican motor carriers may meet the minimum financial responsibility requirements of this subpart by obtaining insurance coverage, in the required amounts, for periods of 24 hours or longer, from insurers that meet the requirements of § 387.35 of this subpart. A Mexican motor carrier so insured must have available for inspection in each of its vehicles copies of the following documents:
(i) The required insurance endorsement (Form MCS-90B); and
(ii) An insurance identification card, binder, or other document issued by an authorized insurer which specifies both the effective date and the expiration date of the temporary insurance coverage authorized by this exception.
(c) Policies of insurance and surety bonds required under this section may be replaced by other policies of insurance or surety bonds. The liability of retiring insurer or surety, as to events after the termination date, shall be considered as having terminated on the effective date of the replacement policy of insurance or surety bond or at the end or the 35 day cancellation period required in paragraph (b) of this section, whichever is sooner.
(1) The proof of minimum levels of financial responsibility required by this section shall be considered public information and be produced for review upon reasonable request by a member of the public.
(2) In addition to maintaining proof of financial responsibility as required by paragraph (d) of this section, non-North America-domiciled private and for-hire motor carriers shall file evidence of financial responsibility with FMCSA in accordance with the requirements of subpart C of this part.
(f) All passenger carrying vehicles operated within the United States by motor carriers domiciled in a contiguous foreign country, shall have on board the vehicle a legible copy, in English, of the proof of the required financial responsibility (Forms MCS-90B or MCS-82B) used by the motor carrier to comply with paragraph (d) of this section.