From the Congressional Record Online through GPO
By Mr. LANCE:
Congress has the power to enact this legislation pursuant
to the following:
Article I, Section 8, Clause 3, of the United States
Constitution, which states that the Congress shall have power
to regulate Commerce with foreign nations, and among the
several states, and with the Indian Tribes.
Article I, Section 8, Clause 18, which states that the
Congress shall have the power to make all laws which shall be
necessary and proper for carrying into execution the
foregoing powers, and all other powers vested by the
Constitution of the United States.