What it is
STANAG 4452 is a NATO Standardization Agreement, currently Edition 1, promulgated on 29 November 2016. Like every STANAG, it is not itself a technical specification. It is the agreement by which NATO member nations commit to implement one, and the specification lives in the Allied Publication it covers: here, AOP-52, Edition B, which carries the guidance on software safety design and assessment of munition-related computing systems.
What the agreement responds to
The document states its own aim plainly: it exists "to respond to the following interoperability requirements," and it defines that requirement as achieving "a reasonable level of assurance that munition related software and software-like devices will behave within the system context and operational environment with an acceptable level of risk." That is the whole technical commitment this cover makes. What the software safety design and assessment guidance actually says is the subject of AOP-52, not of this document.
Ratification and what "where appropriate" means
A STANAG binds a nation, not a company, and only once that nation ratifies it, with the decision reflected in the NATO Standardization Document Database (NSDD). This edition "is effective upon receipt and ready to be used by the implementing nations and NATO bodies," and partner nations are separately invited to adopt it. The document is specific, and worth reading carefully, about what ratifying nations actually agree to: that AOP-52, Edition B "provides comprehensive guidance on Software Safety design and assessment of munition-related computing systems," and that they will apply that guidance "where appropriate to the design and assessment of Software Safety for munitions used by NATO forces." That qualifier matters: it is a conditional commitment to apply the guidance where it is judged to fit, not a blanket requirement on every munition-related computing system. Nations report their effective implementation using the form in Annex H to AAP-03(J); partner nations report adoption using the form in Annex G to the same publication. None of that reporting reaches a supplier directly. It reaches a supplier when a national procurement authority puts AOP-52's guidance into a tender or a contract, which is the point at which the STANAG stops being an agreement between nations and starts being something a programme has to design and assess against.
Review and currency
The STANAG "is to be reviewed at least once every three years," with the result recorded in the NSDD, and nations or NATO bodies may propose changes at any time through a standardization proposal to the tasking authority. This is Edition 1, and the document states plainly that it "does not supersede any document." It also names one related document: STANAG 4297, covering AOP-15, on assessing the safety and suitability for service of non-nuclear munitions.
No certification attaches to this agreement
This cover names no certification scheme and no accredited or notified body, because there is nothing here for an organisation to be certified against. What it describes is a nation's ratification and its judgement about where AOP-52's guidance applies, not a certificate a company can hold.
The publication it covers, and what else it points to
The publication a participating nation actually commits to is AOP-52, Edition B. The wider related-documents list adds STANAG 4297, covering AOP-15, on assessing the safety and suitability for service of non-nuclear munitions, and AAP-03, whose Annex H and Annex G carry the forms nations use to report their implementation and adoption of this STANAG.