What it is
A recommendation, not an obligation
STANREC 4813 is a NATO Standardization Recommendation, Edition 1, dated 16 July 2021. A STANREC is built the same way a STANAG is, with one difference that matters: a STANAG is an agreement nations ratify and commit to implement, a STANREC is a recommendation they are free to take up. STANREC 4813 makes that difference concrete: nations "are invited to use the Allied standard(s) covered by the STANREC and to provide feedback to the NSO on the use of the covered Allied standard(s)" - an invitation, not a ratified obligation. It is supervised under NATO's Modelling and Simulation Group (NMSG).
What it recommends
STANREC 4813 carries no modelling method of its own. Its aim, in its own words, is "to list recommended practices regarding: the latest mobility modelling and simulation predictive tools utilizing terramechanics, uncertainty quantification, GIS information and map based visualization for planning the NATO nations' military vehicle operations, and to support vehicle acquisition and design." The one thing it recommends is a single document: "AMSP-06, Edition A." Under OTHER RELATED DOCUMENTS it names nothing further ("None"), and it names no earlier edition it replaces: this is its first edition. Everything about how a next-generation reference mobility model (NG-NRMM) is actually built, run and interpreted lives in AMSP-06, not in this covering STANREC.
Who is behind it, and how it is kept current
The tasking authority is NATO's Modelling and Simulation Group (NMSG). The STANREC is reviewed "in accordance with AAP-03," with the result "recorded within the NATO Standardization Document Database (NSDD)," rather than against a fixed date printed in the document itself. Under USE, "Member or partner nations and NATO bodies should provide feedback to the NSO on the use of Allied standards covered by a STANREC" - the reporting runs from the nations back to the NATO Standardization Office (NSO), not the other way round.
Where it has force, and where it does not
STANREC 4813 addresses nations and NATO organisations that develop or apply next-generation NATO reference mobility models for planning military vehicle operations, and for vehicle acquisition and design, not a supplier or manufacturer directly. It binds nobody by itself: whatever an organisation ends up doing about mobility modelling follows from a contract that calls up AMSP-06's practice, or from a national programme separately choosing to apply it, not from this recommendation existing. It is a NATO non classified document, "to be handled in accordance with C-M(2002)60," free of charge, and its reproduction restriction is lifted for member or partner nations and NATO commands and bodies.
How it is checked
STANREC 4813 names no certification body, no government quality assurance arrangement, no notified body, and no self-declaration scheme. The only assessment it describes is aimed at the document itself - the periodic review under AAP-03, recorded in the NSDD - not at an organisation, a product, or a specific mobility model. Whatever check a vehicle programme's mobility modelling actually gets is set by whichever nation or NATO organisation applies AMSP-06 to that programme, and that check sits outside this STANREC entirely.