Yeh, I just wasn't sure if it was 23
inclusive (whilst 23) or only up until the age of 23 (before you reach the age of 23). It's not clear. I would hazard a guess that's why so many of these age related questions are asked. The boundaries seem blurred.
Thanks for your help anyway Elvis.
Just for future reference by any other wannabe's that might stumble across this thread in search of OASC info; You may find the following useful:
http://www.airmenaircrew.freeserve.c...c/oasc_pp2.htm
Many thanks.