The included link will take you to A VHA Handbook which lays out policys for many P&O procedures which a number of people have questioned. Whether it helps or hurts your position is questionable but it is authoratative and an official document.
http://www1.va.gov/vhapublications/ViewPublication.asp?pub_ID=338
Good Luck
Jim Fenton, LPO
Fenton Orthotics & Prosthetics
Miami