What is correct regarding the read-back of conditional clearances?
It is compulsory to read-back only the elements of a conditional clearance that can be complied with in full.
They shall be read back in a manner to clearly indicate that they have been understood.
They should be replied to only if unable to comply.
They shall NOT be read back or acknowledged.
ICAO Doc 9432
2.8.3 Issue of clearance and read-back requirements
18.104.22.168 Other clearances or instructions, including conditional clearances, shall be read back or acknowledged in a manner to clearly indicate that they have been understood and will be complied with.
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