What it is
What STANAG 2552 covers
STANAG 2552 is the NATO standardization agreement that gives force to AMedP-9.2 Edition A, the guidelines for a multinational medical unit (MMU). A STANAG is not itself a technical specification: it is the agreement by which NATO nations commit to implement one, and the guidelines' actual content sit in the Allied Medical Publication it covers. This edition explains why the guidelines exist: a multinational Role 3 medical unit "will more often than not be the optimal choice in providing health support to operations, especially at the role 3 level," and having a single document "will be extremely beneficial in planning and standardizing procedures at the MMU." Read plainly, that means the STANAG covers how a multinational medical unit is set up and run to a common standard - a memorandum-of-understanding template, cost capturing, the common funding process and daily operational requirements - not how a piece of medical equipment is designed, tested or bought.
The cover also names related material: MC 0326/3 on NATO's principles and policies of medical support, AJP-4.10 the Allied joint doctrine for medical support, and ABCA Publication 355, Edition 1.
This is Edition 3, promulgated 15 January 2018.
Who ratifies it, and how it takes effect
The mechanism that matters here: a STANAG binds a nation, not a supplier. Participating nations "agree to implement" AMedP-9.2, and their ratification is recorded in the NATO Standardization Document Database (NSDD). "This STANAG is effective upon receipt and ready to be used by the implementing nations and NATO bodies," but effective is not the same as implemented: a nation gives it domestic force only once "the necessary orders/instructions have been issued directing the forces concerned to put the content of this agreement into effect." Ratification and implementation are separate steps, and a supplier meets these guidelines only where a contract or a tasking brings them in, not because the STANAG exists.
This STANAG is supervised by NATO's medical standardization committees - COMEDS, MCMedSB, MedStd and MMSOP - and its custodian is Canada.
What implementation actually means
Nations "are invited to report on their effective implementation of the STANAG using the form in Annex H to AAP-03(J)," and partner nations report their adoption on the equivalent Annex G form. Beyond reporting, implementing nations put in place the memorandum-of-understanding template, cost-capturing arrangements and common funding process the interoperability requirement describes, so a Role 3 multinational medical unit can be stood up on a common footing.
How it's reviewed
This STANAG "is to be reviewed at least once every three years," with the result "recorded within the NSDD." Nations and NATO bodies "may propose changes, at any time, through a standardization proposal to the tasking authority," where they are processed at the next review. That is a standardization review, run by NATO's own machinery, not a certification: the document names no accredited body, no notified body and no audit against it as such.