What it is
STANAG 4340 is a NATO Standardization Agreement, currently Edition 2, dated 12 January 2015. It is not a technical specification. It is the short letter by which NATO nations commit to ratify and implement AEPP-3, Edition B, NATO's own manual of standard packaging test procedures. The document's stated aim is to respond to a single interoperability requirement: "to define guidelines on the environmental testing of packages." Everything a packaging engineer actually needs - the test methods, the environmental conditions, the pass and fail criteria - lives inside AEPP-3, not inside this promulgation letter. Read on its own, STANAG 4340 requires almost nothing of a supplier directly. Its obligations run to nations, and it reaches a contractor only indirectly, once a nation has implemented it and a contract or tender invokes AEPP-3 or the packaging levels of STANAG 4280.
Who it binds, and how
STANAG 4340 is explicit that it binds nations rather than organisations. Its Implementation clause says the STANAG "is effective upon receipt and ready to be used by the implementing nations and NATO bodies," and separately that "the partner nations are invited to adopt this STANAG." Under "Actions by nations," nations that have not yet reported their position are invited to "advise the NSO of their intention regarding its implementation." So "is STANAG 4340 mandatory" has no single answer: it depends on whether a given nation has ratified and implemented it, and, for a supplier, on whether a specific contract invokes AEPP-3 or the STANAG 4280 packaging levels as a result. The document treats a STANAG as implemented "when a nation has issued the necessary orders and instructions, putting the contents of this agreement into effect" - a national act, not a supplier one.
What the agreement actually commits nations to
Under "Agreement," ratifying nations agree "to use AEPP-3 as a manual for providing guidance for the testing of packages in relation to the NATO levels of packaging in STANAG 4280." Under "Standard," the document names exactly what that means in practice: "AEPP-3, Edition B NATO Standard Packaging Test Procedures." Nations are then required to report their position: "national decisions regarding the ratification and implementation of this STANAG are provided to the NSO" and recorded in the NATO Standardization Document Database (NSDD), with effective implementation reported "using the form in Annex H to AAP-03(J)" and partner-nation adoption reported "using the form in Annex G to AAP-03(J)." None of this is written as a duty on a supplier; every one of these duties runs to a nation or to NATO bodies.
Where the real test procedures live
A reader who only has STANAG 4340 in hand does not yet have anything to test against. The test methods, chamber conditions and packaging configurations are in AEPP-3 itself. STANAG 4340's own job is narrower: it accepts AEPP-3 "as a manual for providing guidance for the testing of packages," tied to the packaging levels that a separate document, STANAG 4280, defines. A packaging programme working through this family in practice needs AEPP-3 for the test methods and STANAG 4280 for the packaging levels the tests are run against; STANAG 4340 itself is the agreement that ties the two together for NATO nations.
What it does not cover
STANAG 4340 names no test method, no environmental severity and no pass or fail criterion of its own - that detail lives entirely in AEPP-3. It also names no assessment or certification scheme: its only stated check is that the STANAG itself "is to be reviewed at least once every three years," a periodic review of whether the agreement is still current, with the result "recorded within the NSDD," not an audit of any organisation or product. Several related NATO packaging documents are named as "other related documents" rather than as part of the agreement itself: STANAG 4280 (NATO Levels of Packaging), STANAG 4370 (Environmental Testing), STANAG 4398 (Reusable Containers, AEPP-1), and STANAG 4434 (packaging for materiel susceptible to electrostatic discharge, AEPP-2). None of these is a requirement of STANAG 4340 itself; each is a pointer to a standard a defence packaging programme is likely to meet alongside it.