Originally Posted by
Bula
4.1.6 The pilot in command of an aircraft, receiving an instruction from ATC to change level, must report:
a. when the aircraft has left a level at which level flight has been conducted in the course of climb, cruise or descent; and
b. when the aircraft leaves a level for which ATC has requested a report.
there’s an AND... clear as mud
Keep reporting leaving flight levels in Europe in which some airspaces you just need to say you call sign ( Shannon as example) and you'll be laughed at or someone will tell you there's no need for that.