On Oct. 1, FAA will switch from its traditional domestic IFR flight plan (Form 7233-1) to the International Civil Aviation Organization's Form 7233-4.

The new format appears on FAA Form 7233-4, FAA International Flight Plan (Revision 7/2015). ... The FAA announced the plan to adopt the ICAO flight plan format in late 2016.

The new EFF supports industry-standard ARINC 633 flight plan data, including text-based weather information, Notice to Airmen ... (ICAO) flight plan, all in digital form. ...