I spoke to my co-ordinators today, and ultimately there is no cut-off date for dropping subjects. You are relatively free 2 do it whenever u want too, granted that u have enough units etc etc
However, assessment marks and rankings are due into the board soon, and if your thinking of dropping a subject, do it real soon, so that the school can notify the BOS as soon as possible,and not submit assessment marks 4 u 4 that subject.
Thanks for all your help guys, u put at ease a very frantic, and anxious mind.