RT Requirements to "Call Leaving"
Could I please ask for an opinion from any willing ATC specialists on the need for an aircraft to "Call Leaving"? I'm having a bit of a battle in my current airline about this and would like some advice. I completely understand the need in a non radar environment or if specifically instructed to do so by the controller, but can I confirm that in a radar controlled environment that there is no need to report leaving a level when given an instruction to either descend now or descend when ready?
Many thanks for any help offered.