I think what you're asking is if handle made from many pieces of whatever need a pin in each section.
I'm not a pro or make the rules, but I'd simply suggest that you note the construction of any stacked Scagel style knife, leather stack, or a handle held on by a nut. Many times there is only a single mechanical connection in the last piece and the rest are only sandwiched between the guard/blade shoulders and that last piece. Hope that helps.