Clinical Medical Records Forms. Use the Authorization to Change Form to withdraw from the Advance Directive Registry.Per Nevada State Law, fees are allowed for copies. Download and work with your Health Care Provider to complete the forms, found in the pdf link below. Procedure to Request a Voluntary Health Withdrawal (VHW). Medical Withdrawal Petition (partial or full). This document gives the person you designate as your Agent the power to make health care decisions for you. Notify the UNLV Health Withdrawal Committee (HWC) in writing that you wish to return to UNLV from your Health Withdrawal.