End Use Monitoring · 2 of 5

Routine and enhanced end use monitoring

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In short

  • Routine monitoring is required for all articles and services provided through government to government programs unless designated otherwise.
  • Enhanced designation requires physical security assessments of partner storage sites and inventories conducted by serial number.
  • Additional control measures imposed as a condition of transfer approval are paid for by the partner and stated in the case note.
Published8 September 2026
Last reviewed8 September 2026
Sources current as of8 September 2026

1. Two tiers, and which one is the default

After delivery, monitoring is carried out by United States personnel assigned to Security Cooperation Organizations. It runs on two methods: routine end use monitoring and enhanced end use monitoring (SAMM C8.2.4).

The default is the lighter of the two. "Unless designated otherwise, Routine End Use Monitoring (REUM) is required for all defense articles and services provided via government-to-government programs" (SAMM C8.3.1). Enhanced monitoring is the exception, applied to named articles by a deliberate decision.

The distinction is worth getting right early. It determines whether a partner will be asked to open storage sites and produce equipment by serial number every year, and it is fixed long before delivery, in the terms of the case.

2. What routine monitoring looks like

Routine monitoring is observation rather than inspection. Embassy personnel are required to observe and report any potential misuse or unapproved transfer of United States provided articles to the combatant command, the Defense Security Cooperation Agency and the Department of State (SAMM C8.3.1).

The manual asks for observation at every available opportunity, in the course of other security cooperation work: visits to partner installations, contact with other embassy staff, and any other readily available source of information. Observations are conducted at least quarterly and are recorded in the Security Cooperation Information Portal (SAMM C8.3.1).

A summary report inside that portal lists the categories of exported article that routine monitoring covers. It names battle tanks, armored combat vehicles, artillery systems, fixed and rotary wing aircraft, unmanned aerial systems, warships and military vessels, select missiles and missile systems, military vehicles, bombs, and crew served and individual weapons (SAMM C8.3.1.1).

3. Extra conditions inside the routine tier

Routine treatment does not mean the absence of conditions. Articles normally subject to routine monitoring are sometimes transferred with notes restricting how they may be transported, stored or employed, and embassy staff are expected to know those restrictions and watch for failures to comply (SAMM C8.3.2).

Arms, ammunition and explosives are the clearest case. A detailed transportation plan is required before the material is delivered. Once approved, that plan becomes an integral part of the Letter of Offer and Acceptance, and is available for review by customs and security officials (SAMM C8.3.3). A site survey may also be required to confirm that physical security measures are in place at the destination before delivery.

The manual adds that United States security standards apply throughout the life cycle of such an article, covering transportation, delivery, testing, operational use, storage and destruction (SAMM C8.3.3). A supplier planning a movement into a partner country is planning against that standard, not against local practice.

Munitions containing white phosphorus, and cluster munitions permissible for transfer under United States law, carry additional end use restrictions of their own (SAMM C8.3.4).

4. What enhanced monitoring adds

Enhanced end use monitoring is a designation mechanism. It gives the United States government greater oversight and a fuller assessment of whether a partner is complying with the transfer conditions in a Letter of Offer and Acceptance or other government to government agreement (SAMM C8.4.1).

The manual states what the designation obliges. "EEUM-designated defense articles require enhanced accountability, which include physical security assessments of partner storage sites and inventories conducted by serial number" (SAMM C8.4.4).

It also changes how the article is sold. Designated articles transferred through Foreign Military Sales must be sold on defined order lines, using a coded Military Articles and Services List designator, and must carry physical security and accountability notes (SAMM C8.4.4). The obligation is therefore visible on the case document itself. What those obligations mean in practice is set out in storage site certification and serial number inventories.

5. How an article gets designated

Designation is not automatic and it is not cheap. Because enhanced monitoring commits both American and partner resources, a military department or implementing agency recommending it must submit a request signed at general officer, flag officer or senior executive service level (SAMM C8.4.3). The Defense Security Cooperation Agency and the State Bureau of Political-Military Affairs review and approve the recommendation (SAMM C8.4.4).

Three sources can prompt a designation: a releasability determination by the military department or implementing agency, an interagency releasability determination, or a congressional requirement raised about a proposed transfer (SAMM C8.4.4.1).

The assessment behind a recommendation turns on three named criteria (SAMM C8.4.4):

  • critical program information, meaning the potential loss of a technical or intelligence advantage through unauthorized disclosure;
  • embedded cryptography, meaning damage to the ability to conduct secure communications through unauthorized transfer;
  • diversion threat, meaning the increased threat from a highly portable and concealable article, with man portable air defense systems given as the example.

Reading that list backwards is a reliable way to predict which items on a proposed sale will attract enhanced treatment.

6. Review, and the measures that go beyond monitoring

Designations are not permanent. Each military department and implementing agency must annually assess whether continued enhanced monitoring remains applicable to its articles, and notify the Defense Security Cooperation Agency when that assessment is complete (SAMM C8.4.7).

Some transfers are approved on conditions that go further still. Selected articles may require additional United States control measures, such as American custody or frequent testing, as a condition of transfer approval. Where that happens, all costs of implementing those additional measures, beyond the monitoring described in the chapter, "will be paid by the partner", and the obligation is stated in the security and accountability note on the case (SAMM C8.4.6).

That is a distinction with a budget attached. Ordinary monitoring is funded through the security assistance administrative accounts. Control measures imposed as a condition of release are paid for by the buyer, and appear in the price.

Key terms

REUMRoutine end use monitoring, the default for all government to government transfers. SAMM C8.3.1.
EEUMEnhanced end use monitoring, a designation carrying site assessments and serial number inventories. SAMM C8.4.1.
MASLMilitary Articles and Services List, whose designator codes an article as enhanced on a case line.
AA&EArms, ammunition and explosives, which carry a required transportation plan. SAMM C8.3.3.
SCIPSecurity Cooperation Information Portal, the database where monitoring checks are recorded.

Every statement above links to the document behind it. The full source list for this piece is on the sources page.

This page describes public United States government programs for general information. It is not legal, regulatory or procurement advice, and it does not address the facts of any particular case.

How Sentfore supports this

An enhanced designation changes what a storage site and an annual inventory have to look like on the ground. Sentfore provides protective security, facilities support and secure movement around defense programs in complex environments. Its principals have worked on overseas defense and security programs. Requirements can be sent through the contact page.