The Niagara Falls Bridge Commission is an international public agency which administers three international bridges across the Niagara River connecting the province of Ontario, Canada and the state of New York, United States: the Lewiston–Queenston Bridge, Whirlpool Rapids Bridge and Rainbow Bridge. The NFBC is incorporated as a class D New York State public benefit corporation and is licensed to operate in Ontario under the Extra-Provincial Corporations Act. The commission is based in Lewiston, New York and maintains a post office box address in Niagara Falls, Ontario. It is mostly self-supporting from tolls, leases, and commercial concessions.