scope:

Applicability. This regulation applies to the Active Army, the Army National Guard/Army National Guard of the United States, and the United States Army Reserve. This regulation is applicable during full mobilization unless otherwise stated.

Purpose

a. This regulation establishes policies and assigns responsibilities for the maintenance of Army materiel. It provides and defines requirements for performance and management of the materiel maintenance function.

b. It relates to two categories of maintenance: Field and Sustainment. Field consists of maintenance functions formerly known as Operator/Crew (equipment operators and vehicle crews), unit, and direct support. Sustainment consists of maintenance functions formerly known as general support (GS) and depot operations of the Army maintenance system and Army-wide program for commodity-unique maintenance.

c. This regulation also applies to maintenance of all materiel owned or supported by the U.S. Army, except the following:

(1) Material purchased with nonappropriated funds (Army Regulation (AR) 215-1).

(2) Special intelligence property.

(3) Real property.

(4) Foreign material used for training.

(5) Leased/rented materiel, unless the lease/rental agreement dictates otherwise.

(6) Those aspects of combat and materiel development that impact the materiel maintenance function.

(7) Materiel maintenance as implemented in AR 12-1.

d. The provisions of this regulation are applicable to all Army-funded property under the direct control of the U.S. Army Corps of Engineers (USACE). Civil-funded property under the control of USACE is exempt from the provisions of this  regulation; however , these provisions may be used when considered to be in the  best interest of the Government.