Where owing to ATFM restrictions upon the initial flight plan route, the initial plan is cancelled and a new plan filed there is a need to ensure that the replacement flight plan can be identified as such. Procedures to achieve this have been in use in the European Region for several years but have caused difficulties to states in other regions.
IFATCA Policy is:
ICAO should review, as soon as possible, world-wide procedures and systems for amending or replacing flight plans or flight plan information, to ensure that such system and procedures exist, and that amended or replacement flight plans, or portions thereof, are easily identifiable to control personnel.
WP 34 – Frankfurt 1989
See also: WP 90 – Frankfurt 1989
Last Update: September 28, 2020