The current- 7th - edition[a] is just the cover, and the core of the standard is in set out in "NATO Codes For Grades Of Military Personnel" (APersP-01).
[7] The numbers in the system broadly correspond to the U.S. uniformed services pay grades, with OR-x replacing E-x.
Appendix B of the APP-06 (related to STANAG 2019) standard lists 11 formation/unit groups (13 in US Armed Forces) and identifies the command level of seven of them:[8] This is a general NATO practice, which does not prevent individual branches of the armed forces, for example, the British Army,[9] the U.S. Army[10] and the U.S. Marine Corps,[11] from having their own approaches to the positions held by certain officers and NCOs.
[15] In Ukraine, the introduction of NATO codes for military ranks took place in two stages.
Firstly in 2020, the Verkhovna Rada (Ukrainian parliament) amended the structure of military ranks[16] which was followed in January 2021, by the Minister of Defense of Ukraine approving the compliance of military ranks with NATO codes by order[17] though the order had a confidential status.