41 C.F.R. § 109-1.5105 Identification marking of personal property.
Title 41 - Public Contracts and Property Management
(a) Personal property shall be marked “U.S. Government property” (if marking space is limited, property may be marked “U.S. DOE”) subject to the criteria below. The markings shall be securely affixed to the property, legible, and conspicuous. Examples of appropriate marking media are bar code labels, decals, and stamping. (1) Equipment and sensitive items shall be marked “U.S. Government property” and numbered for control purposes. (2) Administratively controlled property and other personal property susceptible to unauthorized personal use should be marked “U.S. Government property” and numbered for control purposes. (b) Personal property which by its nature cannot be marked, such as stores items, metal stock, etc., is exempted from this requirement. (c) To the extent practicable and economical, markings shall be removed prior to disposal outside of DOE, or, if removal is impractical, additional permanent markings must be added to indicate such disposal.
Title 41: Public Contracts and Property Management
PART 109–1—INTRODUCTION
Subpart 109–1.51—Personal Property Management Standards and Practices
§ 109-1.5105 Identification marking of personal property.

