I'm being loose with "agent" to mean "person you call, plus anyone they reach out to for support and/or authorization" - but I think we are broadly in agreement here. All I can say is that in my experience, I have been able to do something like what OP wants, but only in an INVOL situation. Based on holds and times, I would conclude any HUCA is a front-line agent who says "no, this is impossible" without trying, and that anyone actually calling for said authorization has received it, at least in my cases. I personally don't escalate to supervisors in most cases, and just HUCA instead.