You're welcome....and after re-reading my post, I want to apologize if it came off like I was correcting you personally--my intention was just to clarify for others as well.
The information I got was from the website, and from the downloadable form that you take to your vet to fill out. I think maybe many people are thinking of the hip certification, which does require x-rays sent in to OFA. To me, the OFA certification on LP is not really certification at all, it is just registration of what your vet says. I think it's a good thing to do, as it creates a database of animals without LP, but I don't know why so many place so much emphasis on it, because health-wise it's no different than getting your vet exam.
That's a good reminder, that LP often comes and goes during growth....it's easy to forget that when you hear the dx on a puppy, it might change as it grows. Also, I have found that, unfortunately, many vets simply do not know how to properly grade it.