Commerce. Any trade, traffic, or transportation in the United States which:
(1) Is between a place under the jurisdiction of a State or Indian tribe and any place outside of such jurisdiction; or
(2) Is solely within a place under the jurisdiction of a State or Indian tribe but which affects trade, traffic, or transportation described in subparagraph (a).
49 CFR § 397.65
For purposes of this subpart, the following definitions apply: