This publication is a major revision to AR 5-12. This regulation on the Army's use of the electromagnetic spectrum has been revised to update Army policies and responsibilities across the entire range of the electromagnetic spectrum. It mandates the integration and synchronization of Army spectrum management processes with all five phases of the Defense Acquisition System and Department of Defense funding categories. It also describes the Army spectrum management functional processes necessary to achieve compliance with statutory provisions, regulations, and technical standards required by the International Telecommunication Union; the National Telecommunications and Information Administration's Manual of Regulations and Procedures for Federal Radio Frequency Management; Part 300, Title 47, Code of Federal Regulations; and the provisions of Department of Defense Instruction 4650.01. This update delineates a range of consequences for individuals or organizations resulting from noncompliance with spectrum policies and regulations. This regulation applies to the Active Army, the Army National Guard/Army National Guard of the United States, and the United States Army Re- serve, unless otherwise stated. The proponent of this regulation is the Army Chief Information Officer/G-6.