According to a statement posted Saturday morning on Air Canada’s Web site, the Transportation Security Administration will severely limit the behavior of both passengers and crew during flights in United States airspace — restricting movement in the final hour of flight. Late Saturday morning, the T.S.A. had not yet included this new information on its own Web site.

“Among other things,” the statement in Air Canada’s Web site read, “during the final hour of flight customers must remain seated, will not be allowed to access carry-on baggage, or have personal belongings or other items on their laps.”

The suspect, identified as Abdul Farouk Abdulmutallab, 23, tried to light his explosives while the plane was descending into Detroit on Friday.