a. The abbreviations contained herein, and the abbreviations printed in italics in chapters 2 and 3, comprise the abbreviations authorized for use between the United States, United Kingdom, Canadian, and Australian armies and listed in QSTAG 163 (Military Abbreviations). The following terms and abbreviations are no longer authorized for use within the Department of the Army:
(1) AA--antiaircraft.
(2) BW--biological warfare.
(3) CW--chemical warfare.
(4) JAAOC--Joint Aircraft Operations Center.
(5) LAA--Light antiaircraft.
(6) LMG--Light machine gun.
(7) MMG--medium machine gun.
b. National Distinguishing Letters for components of Army Forces smaller than a division are to be used only when it is necessary to avoid confusion.
c. The National Distinguishing Letters for Canada are not to be used to identify Canadian Army formations which have the word"Canadian" in their official designation.
d. The letters "UK" denote the United Kingdom, or a force or part of a force provided solely from the United Kingdom. The letters "BR" may, however, be used in special cases to denote a force comprising units or elements of more than one country of the British Commonwealth.