Each center has a PBCT parameter for each internal airport. Proposed internal flight plans are transmitted to the adjacent center if the flight time along the proposed route from the departure airport to the center boundary is less than or equal to the value of PBCT.

Listed in the Pilot/Controller Glossary as a cross-reference to PROPOSED BOUNDARY CROSSING TIME, whose text is shown above.

Source FAA Pilot/Controller Glossary↗ · checked 2026-08-25