Many luthiers have many year's supply of instrument wood for the simple reason that they won't use wood that they haven't had in their personal possession and control for 5 year or more (that's so they know it is properly seasoned). So if, the year before the ban was implemented, a luthier had a five or ten year supply of BR, and then after the ban, started charging prohibitive prices for BR instruments, he or she might conceivably have quite a bit of BR left in the stash. Our local banjo maker sold me a BR fingerboard blank for $5 last year. He said he's had a whole stack of them for longer than he can remember.

What year did the ban become effective?