(a) General Rules. - The Secretary and the Board have jurisdiction over transportation insofar as water carriers are concerned - (1) by water carrier between a place in a State and a place in another State, even if part of the transportation is outside the United States; (2) by water carrier and motor carrier from a place in a State to a place in another State; except that if part of the transportation is outside the United States, the Secretary only has jurisdiction over that part of the transportation provided - (A) by motor carrier that is in the United States; and (B) by water carrier that is from a place in the United States to another place in the United States; and (3) by water carrier or by water carrier and motor carrier between a place in the United States and a place outside the United States, to the extent that - (A) when the transportation is by motor carrier, the transportation is provided in the United States; (B) when the transportation is by water carrier to a place outside the United States, the transportation is provided by water carrier from a place in the United States to another place in the United States before transshipment from a place in the United States to a place outside the United States; and (C) when the transportation is by water carrier from a place outside the United States, the transportation is provided by water carrier from a place in the United States to another place in the United States after transshipment to a place in the United States from a place outside the United States. (b) Definitions. - In this section, the terms "State" and "United States" include the territories and possessions of the United States.