Have a look here: http://wiki.tuhs.org/doku.php?id=events:free_licenses In particular note that in 2002 the copyright owner made the old V7 code and 32V Unix code available as open source with a BSD-like license.
While 3BSD was derived from 32V, it also included a lot of other code that was copyright separately (or simply ownership details were lost). You can not assume the 2002 license applies to the non-32V code. 3BSD was not under any type of open source BSD license. It was proprietary code. A decade later huge portions were rewritten or relicensed using the then new BSD licensing. (There were multiple revisions of the BSD license even back then.) So in other words, it would be difficult and possibly wrong to use 3BSD using a current BSD license. They don't match up. Then again, it probably doesn't matter. By the way, I am curious, why 3BSD? (3BSD doesn't have IP/TCP for example and has very limited supported hardware.) There are somewhat maintained continuations or forks for 2.11BSD and 4.3BSD-Tahoe (like "Quasijarus"). (Someday, hopefully soon, I will finish my lengthy book all about this.)
