1. This article shall not apply to any motor vehicle for the operation of which security is required to be furnished under section three hundred seventy of this chapter, including those for which a certificate is issued pursuant to section three hundred seventy-one of this chapter or under a similar law in another state except as may be provided in section three hundred seventy; to any motor vehicle operated under a permit or a certificate of convenience and necessity issued pursuant to the transportation law, or under a permit or certificate issued by the public utility regulatory agency of another state; nor to any vehicle for which a permit or certificate is in force pursuant to the interstate commerce act nor to any motor vehicle owned by the United States, any state or any political subdivisions of any state.2. Provided, however, that any motor vehicle exempted in subdivision one of this section from the provisions of any portion of this article shall be subject to the provisions of article fifty-one of the insurance law.N.Y. Veh. and Traf. Law § 321