I found the answer on the CIC web;; w% p2 s- O6 c2 a& m
"The certificate must have been issued no more than three months before you submit your application"! G" a; z6 _/ S4 |" h7 ~; T
( ]0 d! y1 X+ d. R9 J- w6 k. j3 BOurs were more than one year when we applied.