My understanding of that section you quoted means that the controller is never to say the word takeoff to an aircraft until that aircraft is being cleared for takeoff.
I think it works both ways - you (as a pilot) cannot use the word "Take-Off" until you are cleared for take-off.
But after rereading the ICAO-bible (DOC 4444 12.3.4.10) - it seems that the phrase "Ready" is sufficient - the words "For departure" are optional.
(Have been RT-instructor 8 years and just learned something new - again)