they dun care age liao ,they will send letter say u are due for
enlistment after your o lvls then hor they will ask u if u are
going to continue studying and need deferment.if you do then they
will ask u apply with evidence.(ur acceptance letter frm sch) then
they will auto defer u till u graduate or get kicked out.If you do
something stupid like study till final sem then decide to change
course and start frm yr 1 again then u gotta reapply for deferment
and see if they wanna give u anot.