No, I haven't read the CIF's rule. I don't doubt that the CIF doesn't have specific language barring Seniors from playing JV.
My point is that from all my experience with HS sport, Seniors are not typically allowed to compete on JV. It may not be against CIF rules for Senior to compete at the JV level, but in practice(because of league rules or any other reason) it normally doesn't happen.
Right, but my point is that just b/c it doesn’t happen often doesn’t mean it’s not allowed. Especially since there are coaches and parents on this forum stating it does happen and it is allowed.