Data Standards - Item Unique Identification (IUID)

Unique Identifier (UI):   A character string, number, or sequence of bits assigned to a discrete entity or its associated attribute which serves to uniquely distinguish it from other like and unlike entities. Each unique identifier has only one occurrence within its defined scope of use. (Ref: DoD Directive 8320.03)

Unique identification (UID):   A system of establishing globally unique and unambiguous identifiers within the Department of Defense, which serve to distinguish a discrete entity or relationship from other like and unlike entities or relationships. (Ref: MIL-STD-130N Change 1)

Unique item identifier (UII):   A globally unique and unambiguous identifier that distinguishes an item from all other like and unlike items. The UII is derived from a UII data set of one or more data elements. (Ref: MIL-STD-130N Change 1)

Item unique identification (IUID):   A system of establishing unique item identifiers (UII) within the DoD by assigning a machine-readable character string or number to a discrete item, which serves to distinguish it from other like and unlike items. (Ref: MIL-STD-130N Change 1)

Item:   “Item” means a single hardware article or a single unit formed by a grouping of subassemblies, components, or constituent parts. (Ref: DFARS 252.211-7003)

DoD Instructions

Requires unique item level traceability for all DoD serially managed items that are also sensitive or pilferable, all DoD serially managed CSI, all NWRM, depot level reparables, and any item that the DoD materiel manager decides requires unique item level traceability using a unique item identifier (UII) assigned to each individual item

Assigns responsibility to apply item unique identification (IUID) using unique item identifier (UII) in accordance with DoDI 8320.04 for critical materiel identified as susceptible to counterfeiting to enable authoritative life-cycle traceability and authentication

Establishes a serialized item management program where the (parts, c Military Departments and Defense Agencies: 1. Identify populations of select itemsomponents, and end items); 2. Mark all items in each population with a unique item identifier (UII); 3. Generate, collect, and analyze maintenance, logistics, and usage data about each specific item

Requires DoD Components to utilize the DoD IUID Registry and its integral GFP module to trace GFP at the unique item level by unique item identifier (UII) and to maintain accountability of each GFP item meeting the requirements of subpart 252.211-7007 of the DFARS by its UII

Requires relocatable buildings purchased as equipment to be inventoried and accounted for with an IUID in accordance with DoDI 8320.04 and maintained in accordance with DoDI 5000.64

Requires IUID planning and implementation be documented in an IUID Implementation Plan and included in the program’s Systems Engineering Plan (SEP) at Milestones A, B, and C

Requires accountability of property be enabled by IUID for identification, tracking, and management in accordance with DoDD 8320.03; Requires accountable property records be established in an accountable property system of record (APSR); Requires a Unique item identifier (UII) or DoD recognized IUID equivalent, if available and necessary for unique identification, in addition to other data elements, at a minimum, of an APSR; Requires organizations to retain accountability for property they place in an in-transit status, at a minimum requiring records of: 1. part number, NSN, serial number, UII, or DoD recognized IUID equivalent, nomenclature, quantity, and value of items shipped from contractors or vendors for which title has passed to the Government, 2. part number, NSN, serial number, UII, or DoD recognized IUID equivalent, nomenclature, quantity, and value of items shipped from one organization to another organization, for which accountability is retained by the accountable organization until receipt and acceptance by the consignee, and 3. part number, NSN, serial number, UII, or DoD recognized IUID equivalent, nomenclature, quantity, and value of items being moved from one location to another location within an organization

Requires the application of risk management practices include TSN process, tools, and techniques to implement IUID for national level traceability of critical components in accordance with DoDI 8320.04

Requires acquisition strategies and programs consistent with DoDI 8320.04 for medical materiel management that promote standardization of medical supplies and equipment; Requires coordination and support for initially registering in the DoD IUID Registry and utilizing the DoD IUID Registry as an authoritative data source to support Defense Medical Logistics Standard Support (DMLSS) and component property systems for all defense medical materiel that have a unique item traceability requirement at any point in their lifecycle

Prescribes procedures and assigns responsibilities for uniquely identifying personal property and for establishing accountability and value over uniquely identified personal property; Prescribes standards for constructing the unique item identifier (UII); Assigns responsibilities and establishes procedures for the maintenance and operation of the DoD IUID Registry; Establishes the DoD IUID Registry as the authoritative source of Government unit acquisition cost for items with UII and UII pedigree data established at delivery, and the master data source for GFP; Establishes the functional framework for IUID as it relates to associated DoD policy and guidance

Requires the use of the national and international standards for external OUID designations to identify external enterprises in item unique identification (IUID)

DoD Directives

Requires, in accordance with DoDI 8320.04, the identification of nuclear weapon-related material items using an item-unique identification construct, ensuring of accuracy of items identification data, and the providing of nuclear weapon-related material item-unique identification information to incident response teams upon request

Establishes policy and prescribes the criteria for creation, maintenance, and dissemination of UID data standards for discrete entities; Establishes policy and assigns responsibilities for the establishment of the Department’s enterprise-wide UID strategy and for the development, management, and use of unique identifiers and their associated authoritative data source in a manner that precludes redundancy

DoD Publications

Integrates IUID requirements into the DLMS processes and relevant transaction sets

Integrates IUID requirements into MILSTRIP DD Form 1348-A, Issue Release/Receipt document

Provides the baseline elements of information (BEIs) for those assets identified as task critical assets (TCAs) or defense critical asset (DCAs); Requires the documentation of TCAs in accordance with DoDI 8320.04

Requires a unique item identifier (UII) be assigned to individual assets of an item being controlled or managed under a unique item tracking (UIT) program

Requires unit-level personnel to perform 100% monthly physical count and installation personnel to perform 100% semi-annual physical count of security risk category (SRC) I missiles and rockets and SRC II-IV arms by serial number or UII; Requires unit-level personnel to perform 100% quarterly physical count and installation personnel to perform 100% semi-annual physical count of SRC II and III missiles and rockets by serial number or UII

Establishes responsibilities and procedures for the UID of force structure data in software application programs known as GFM organization servers (OSs); Requires any personal property or real property chosen by GFM components for inclusion in OSs be uniquely identified as specified in DoDD 8320.03, DoDI 8320.04, and DoDI 4165.14


Provides policies for unique item identification, valuation, reporting of Government-furnished property, and assignment of Government-assigned serial numbers; Identifies the contract clauses to include in solicitations and contracts for each of these policies

Provides definitions of IUID-related terms and IUID requirements for identified items; Requires IUID requirements to be included in subcontracts if applicable

Provides requirements for marking major end items with Government-assigned serial numbers and the registration of the Government-assigned serial numbers with the unique item identifiers (UII)


Compliance with Defense Federal Acquisition Regulation Supplement Subpart 252.211-7003, Item Identification and Valuation, January 2015. Directs Services and Agencies to compile quarterly reports that reflect the rate of inclusion of the clause in contracts procuring IUID items.

Preservation and Storage of Tooling for Major Defense Acquisition Programs (MDAPs), August 3, 2009 Identifies unique tooling designated for storage and preservation as DoD serially managed, requiring IUID

Item Unique Identification (IUID) of Tangible Personal Property – Policy Refinement for Secondary Items in Use or in Inventory, December 30, 2010 Refines the requirements for the application of IUID to secondary items in use or in inventory


Provides minimum requirements for uniform military marking for shipment and storage; Provides identification linear (Code 39) and 2D (PDF417) bar code content and marking requirements, including UIIs, for non-ammunition containers, unit packs, intermediate containers, and exterior shipping containers; Provides special marking requirements for components of disassembled items with UIIs; Provides requirements for IUID data in DD1348-1A

Provides item marking criteria for development of specific marking requirements and methods for identification of items of military property produced, stocked, stored, and issued by or for the DoD, including criteria and data content for both free text and machine-readable information (MRI) applications, including IUID

Procurement Toolbox

IUID Training, Guides, and Other Resources

IUID Registry

To access the IUID Registry website, please use the following link: