Not if you don't want to, as I mentioned above most can relate to other countries scores. As far as imports on hip/elbow clearances, I will say some will re-Xray and submit to OFA but I know of several cases where it was not done and it really did not seem to bother anyone. Two examples of this are Guidelines Mastercard and Trendmaker's Tycoon. There are several others I can think of but those probably are the most famous.
Like most people here, I did X-rays at one year. All the dogs/bitches I'll be bringing are rated excellent (in our scoring system . . . hips 3:1, 2:1, 0:1 . . . elbows 0:0, 0:0, and 0:1). Will I have to have them re-Xrayed?