NORBA got absorbed by USA Cycling. USAC kept it around a while as a named division; but about 4 or 5 years ago dropped the NORBA moniker entirely. USAC continues to treat MTB as the red-headed stepchild and, as of this year, has changed the Beginner/Sport/Expert/Semi-Pro/Pro classifications to the more road-like Cats: Cat 3, 2, 1, Pro. Semi-pro is gone. S-Ps had to chose to either go full Pro or drop back to Cat 1/Expert.
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Originally Posted by Mark Twain
"Don't argue with stupid people; they will drag you down to their level and then beat you with experience."