It would be helpful if slips could tell if an item being listed for checkout is being controlled by decreaseLoanHighHolds, so we have a way to use Template Toolkit to make this stand out or explain something about the loan (i.e. This item is in high demand, so it has a shorter loan period, and cannot be renewed).
Any special case where normal behavior is altered should have some way for us to address or highlight, in slips and notices.