Timing of Post-Flight Notification

In plain language

If you are legally allowed to submit your flight plan after starting your flight, you must submit it as soon as possible after taking off.

Requirement as structured

If a flight plan is submitted after starting a Specified Flight (特定飛行) under the permitted exception, it must be submitted promptly after the start of the flight.

Original regulatory text

4　法第百三十二条の八十八第一項ただし書の規定により特定飛行を開始した後に飛行計画を通報する場合は、当該特定飛行の開始後速やかに通報しなければならない。