Restrictions on Huddle?

[Scuba_ref]

Over the holidays I worked a local high school tournament so we are dealing with Fed rules.

During a 30 second time out the players, bench dwellers and coaches were huddled on the court. One of the officials approached the huddle and told the coach that only the headcoach and the 5 players could be huddled on the court in front of the bench. I know that there is a restriction in football regarding huddle participants on the field based upon location of the huddle, but I had never heard, seen nor read such regarding basketball. I went through the books today and couldn't find anything to back up that official's statement. Am I missing something?