The Army Noncommissioned Officer Guide: U.S. Army NCO Guide - FM 7-22.7 (TC 22-6)FM 7 22. 7 provides the Armys noncommissioned officers a guide for leading, supervising and caring for soldiers. While not all inclusive nor intended as a stand alone document, the guide offers NCOs a ready reference for most situations. The Army NCO Guide describes NCO duties, responsibilities and authority and how they relate to those of warrant and commissioned officers. It also discusses NCO leadership, counseling and mentorship and the NCO role