Once you get your CWP, never fall behind of renewal! Never!!!!!
I slipped up and let mine expire after having it 10yrs. If it expires even by one day, then you have to be recertified before you can renew. You can renew it on time till the end of time, but should you be late to renew it, your certification expires before your lic. does.
So just a heads up to those that already have their CWP, and those that are getting it, don't be late!