Originally Posted by
dera
Might want to recheck that before shouting that too loud.
AIM 5-3-3
Additional Reports- The following reports should be made to ATC or FSS facilities without a specific ATC request:
- At all times.
- When vacating any previously assigned altitude or flight level for a newly assigned altitude or flight level.
AIM isn't regulatory, but the amount of times I’ve reported vacating and then had a controller ship me to the next frequency indicates that the vacating call has some sort of use. If they’re swamped I won’t step on anyone to get that call in though.