Read back rate of climb/descent
Flying commercial jets for a while sometimes you run into a question that you can not find the answer for:
Last week on a line flight we where cleared from cruiselevel to descent to FLxxx with a rate of 1500 FPM.
FO read back: "cleared descent FLxxx with given rate"
I kindly requested him to read back the full clearance what he did without discussion.
But he mentioned that read back of the cleared rate is not required.
Until know I have not been able to find the correct answer. (OM-A,CAP413, ICAO9432 etc).
The thing that I am looking for is the written legal requirement to be read back (eg. FL, Heading, QNH, heading etc). Practically speaking I feel it is more politeness and professional behaviour to do it. But that is not the point here. Thank you for any input.