This United States Army manual, Army Regulation AR 27-26 Legal Services: Rules of Professional Conduct for Lawyers March 2025, provides comprehensive rules governing the ethical conduct of Army lawyers, military and civilian, and, pursuant to Rule for Courts-Martial (RCM) 109, Manual for Courts-Martial (MCM), of non-Department of Defense civilian lawyers who practice before tribunals and other proceedings governed by the Uniform Code of Military Justice (UCMJ), the MCM, or under the supervision of The Judge Advocate General, and of all non-Department of Defense civilian lawyers who practice in proceedings that are under the supervision of one of the Senior Counsels (as defined in appendix B, Rule 1.0(s)). It also provides professional conduct advice to all other Army personnel, military and civilian, to whom these Rules apply (see para 7).