N.C. Gen. Stat. § 62-268
No certificate or broker's license shall be issued or remain in force until the applicant shall have procured and filed with the Division of Motor Vehicles such security bond, insurance or self-insurance for the protection of the public as the Commission shall by regulation require. The Commission shall require that every motor carrier for which a certificate or license is required by the provisions of this Chapter, shall maintain liability insurance or satisfactory surety of at least fifty thousand dollars ($50,000) because of bodily injury to or death of one person in any one accident and, subject to said limit for one person, one hundred thousand dollars ($100,000) because of bodily injury to or death of two or more persons in any one accident, and fifty thousand dollars ($50,000) because of injury to or destruction of property of others in any one accident; and the Commission may require any greater amount of insurance as may be necessary for the protection of the public. Notwithstanding any rule or regulation to the contrary, the Commission shall not require that any insurance procured and filed be provided in any single policy of insurance or through a single insurer, if the insurers involved are otherwise qualified. A motor carrier may satisfy the requirements of the Commission by procuring insurance with coverage and limits of liability required by the Commission in one or more policies of insurance issued by one or more insurers.
Notwithstanding any other provisions of this section or Chapter, bus companies shall file with the Commission proof of financial responsibility in the form of bonds, policies of insurance, or shall qualify as a self insurer, with minimum levels of financial responsibility as prescribed for motor carriers of passengers pursuant to the provisions of 49 U.S.C. § 31138. Provided, further, that no bus company operating solely within the State of North Carolina and which is exempt from regulation under the provisions of G.S. 62-260(a)(7) shall be required to file with the Commission proof of the financial responsibility in excess of one million five hundred thousand dollars ($1,500,000).
N.C. Gen. Stat. § 62-268