(a) In general. The tax imposed by section 4261(b) applies to amounts paid outside the United States for the taxable transportation of persons, but only if such transportation begins and ends in the United States. Thus, in addition to the exclusion provided for certain travel under section 4262(b), the tax imposed by section 4261(b), shall not apply unless the transportation both begins and ends within the United States. Accordingly, the tax does not apply to a payment made outside the United States for one-way or round-trip transportation between a point within the United States and a point outside the United States.
(b) Transportation between two or more points in the United States.
(1) For purposes of this section, a payment made outside the United States for transportation between two or more points in the United States is a payment for transportation which begins and ends in the United States, even though additional transportation to or from a point outside the United States is involved in the entire journey, if at the time of making payment for the transportation between two or more points in the United States it is not definitely established, under the rules set forth in §49.4261-6, that such transportation is purchased for use in making the journey from or to a point outside the United States. The fact that the entire journey includes transportation from or to a point outside the United States is not in itself determinative of the liability for tax.
(2) The following examples illustrate the application of this paragraph:
(c) Cross reference. See section 4262(b) and §49.4262(b)-1 for a partial exclusion with respect to amounts paid for certain transportation.