What it is
STANAG 7112 is a NATO standardization agreement, not a technical specification in its own right. It is the mechanism by which NATO member nations agree to use one publication, AAMedP-1.20, for recommended medical equipment for aeromedical evacuation, so that a casualty moved by air between different national forces is not handled against a different standard of equipment depending on whose aircraft carries them. The equipment detail itself lives in AAMedP-1.20; this agreement only commits nations to it.
What the agreement is for
The stated aim is to standardize the quality of the medical materials used so that aeromedical evacuation can be carried out securely from both a medical and an aeronautical standpoint, across forward, tactical and strategic evacuation, and so that nations can exchange comparable information about the equipment they use and interoperate. Participating nations agree to implement a single named standard to meet that aim: AAMedP-1.20, Edition A. This is Edition 2 of the STANAG, which supersedes Edition 1; the letter of promulgation does not record what changed between the two.
Ratification and implementation are separate steps
A nation ratifying STANAG 7112 and a nation implementing it are not the same event, and the agreement treats them separately. Ratification, and a nation's intentions regarding implementation, are recorded in the NATO Standardization Document Database (NSDD); nations that have not already done so are asked to examine their own ratification and advise the NATO Standardization Office (NSO) of their intentions. Implementation is a further, national act: a nation is treated as having implemented the agreement once it has issued the orders or instructions that put AAMedP-1.20 into effect domestically, and nations, together with any partner nation that adopts the STANAG, are invited to report that in accordance with AAP-03. Partner nations are invited to adopt the STANAG without incurring the ratification obligation that applies to member nations.
The practical consequence: there is no general answer to whether STANAG 7112 is mandatory. It binds a nation once that nation has ratified and implemented it, and it reaches anyone working under that nation's forces through whatever national instruction or contract then invokes AAMedP-1.20.
Review and governance
The agreement is reviewed at least once every five years, and the result of each review is recorded in the NSDD. Nations and NATO bodies can propose changes at any time, through a standardization proposal to the tasking authority, and any change is processed at the STANAG's next review rather than immediately. STANAG 7112 is supervised by NATO's Military Committee Air Standardization Board (MCASB).
Standards it references
STANAG 7112 covers AAMedP-1.20, the Allied Medical Publication it brings into force; that record covers what the publication itself requires, not this one.
The letter of promulgation also names four other STANAG/Allied Publication pairs as related documents, not as requirements this agreement itself imposes: STANAG 2040 / AMedP-2.1 on stretchers, bearing brackets and attachment supports; STANAG 2087 / AAMedP-1.5 on forward aeromedical evacuation; STANAG 3198 / AAMedP-1.3 on functional requirements of aircraft oxygen equipment and pressure suits; and STANAG 3204 / AAMedP-1.1 on aeromedical evacuation. Nations report their implementation of STANAG 7112, and partner nations their adoption of it, in accordance with AAP-03.
Obtaining it
NATO's Standardization Document Database lists the catalogue and serves the unclassified documents free of charge. NATO does not sell STANAG 7112 and neither do we; find the record on the NSDD.