Ok... so I'm a little late to the party...

If you receive a Provisional, you have 6 months to work on what you need to, and return for a re-evaluation at no charge IIRC.

Also, one can qualify for a Recreational Pass or a Technical Pass. If you have received a Recreational Pass, there is no limit as to when you can upgrade to the Tech Pass, but there is a small fee for the instructor's time.