International Operations Appendices
[ICAO Doc 4444, ¶12.2.7] Conditional phrases, such as "behind landing aircraft" or "after departing aircraft", shall not be used for movements affecting the active runway(s), except when the aircraft or vehicles concerned are seen by the appropriate controller and pilot. In all cases a conditional clearance shall be given in the following order and consist of:
- the condition;
- the clearance; and
- brief reiteration of the condition,
"SAS 941, BEHIND DC9 ON SHORT FINAL, LINE UP BEHIND".
Note.— This implies the need for the aircraft receiving the conditional clearance to identify the aircraft or vehicle causing the conditional clearance.
It may exist someplace else, but this is the only place I've seen it in writing. In actual practice, however, I've seen it several places in Europe, usually in the form "Behind the landing _____, line up and wait."
ICAO Doc 4444 - Air Traffic Management, 16th Edition, Procedures for Air Navigation Services, International Civil Aviation Organization, October 2016