; and (2) in the case of an air carrier or foreign air carrier, in written communication at the time a flight experiences a controllable significant delay or cancellation. (d) Definitions In this section: (1) Controllable significant delay or cancellation The term controllable significant delay or cancellation means a significant delay or cancellation that is caused by an air carrier or foreign air carrier. (2) Significant delay In this section, the term significant delay means, with respect to air transportation, the departure or arrival at the originally ticketed destination associated with such transportation has changed— (A) in the case of air transportation within the United States, by 3 or more hours; or (B) in the case of air transportation to or from a location outside the United States, by 6 or more hours. . (b) Clerical amendment The analysis for subchapter I of chapter 417 of title 49, United States Code, is amended by adding at the end the following: 41727. Provision of alternative air carrier transportation for delays or cancellations. .