Division (1) The flight crew shall read back to the air traffic controller safety-related parts of ATC clearances and instructions which are transmitted by voice. The following items shall always be read back:

ATC route clearances;

clearances and instructions to enter, land on, take off from, hold short of, cross, taxi and backtrack on any runway; and

runway-in-use, altimeter settings, SSR codes, newly assigned communication channels, level instructions, heading and speed instructions; and

transition levels, whether issued by the controller or contained in ATIS broadcasts.