Penalty for Disconcertion . . . by Whom?

[Freddy]

. . . it has been the concensus of many of the esteemed members of both this Forum and the NFHS Forum, that Disconcertion can be charged to Bench Personnel.
This fact I accept is correct, by rule.

. . . there are situations where tha actions by the Bench Personnel could be so egregious that the appropriate infraction should be an Unsportsmanlike TF . . .
This fact I accept is correct, by rule.

. . . rather that a Disconcertion Violation.
This is what I'm trying to find on the basis of a rule--whether indeed a violation can be called on bench personnel. My supervisor, whom I regard as much more rules knowledgable than anyone I know, was under the distinct impression that violations can only be called on players on the floor. I'm not out to disagree with him, only to become definitively clear on the issue.

I sure do thank those whose efforts have helped me thus far and, though I've studied the previous posts on this site, I will also check out the NFHS site a little later this afternoon.