bmi diamond club - how close to departure can you request an itin change?

I believe you can cancel an existing booking right up departure, but what about making a change - is it the same as for making a new booking (i.e. 7 days out for blue/silver, and 3 days for gold)?
Or can you do it close to the time?

I'm kicking myself for not being able to call the ICC yesterday after seeing a much better itin for a trip in 10 days' time (which of course went overnight at my end - pesky work meetings and time differences :mad:) but can't easily see just up until when I could call the ICC to make a change if something else comes up...

The official line is same deadline as doing a booking for the first time, but sometimes you can get lucky with an ICC agent beyond the official deadline. Just don't bank on it, though.