From 14 CFR Part 382 (the part of the Code of Federal Regulations that actually implements the Air Carrier Access Act):

§ 382.3 Applicability.
(a) Except as provided in this section, this part applies to all air carriers providing air transportation.
(b) Sections 382.21-382.63 do not apply to indirect air carriers.
(c) This part does not apply to foreign air carriers or to airport facilities outside the United States, its territories, possessions, and commonwealths.
(d) Nothing in this part shall authorize or require a carrier to fail to comply with any applicable FAA safety regulation.

Note paragraph (c) This part does not apply to ... airport facilities outside the United States ...

You can find the full text at http://airconsumer.ost.dot.gov/rules/382SHORT.htm