Army regulation AR 25-1 pertains to information management and information technology. It establishes the Army's Chief Information Officer and the positions duties.
It depends which army you mean
AR-710
Not A real Army Regulation
AR 40-66
AR 530-1 is the Army Regulation for Operations Security or OPSEC. it outlines the regulation and procedures for practicing operations security.
Department of the Army Pamphlet 385-10 Army Safety Program Dated 23 May 2008 The AR (Army Regulation) that covers safety is AR 385-10, The Army Safety Program (29 February 2000)
Ar 385-64
AR 25-2 Ar 25-2 AR 25-2
Ar 380-53
AR 350-01, AR 600-9 and FM 21-20
Ar 25-50
Ar 600-55