R.I. Gen. Laws § 39-14.1-7: Proof of financial responsibility.

The owner of any public motor vehicle, operating under this section, shall file with the division of public utilities and carriers a certificate of insurance issued by an insurance company authorized to transact business in this state, showing that the owner has a policy insuring the public motor vehicle company against liability for injury to persons and damage to property that may be caused by the operation of the public motor vehicle, this policy to provide for the indemnity in the sum of not less than one million five hundred thousand dollars ($1,500,000) for personal injury and indemnity of not less than one hundred thousand dollars ($100,000) for damage to property.