AGENCY:

Bureau of Transportation Statistics, Office of the Assistant Secretary for Research and Technology, U.S. Department of Transportation.

ACTION:

Final rule; delay of effective date.

SUMMARY:

The U.S. Department of Transportation (Department or DOT) is delaying the effective date of its September 3, 2026 final rule, titled “Cause of Airline Delay and Cancellation Categories under Section 511(b) of the FAA Reauthorization Act of 2024,” until February 1, 2027.

DATES:

The effective date of the final rule published on September 3, 2026 (91 FR 56588) is delayed until February 1, 2027.