For what it's worth, it's not an "L-100" rating, or at least it isn't anywhere I've been. The aircraft type is L382. That's the type designator which is used for certification of both aircraft and airmen.
I can't really explain why Lockheed also used the name "L-100". It confuses a lot of people. We frequently get asked if it's an L-100 or an L382, or what the difference between the two are. There is no difference, it's two names for the same thing. But if you get a type rating for it, it's going to say L382 on your certificate.