Its in lasors
And also JAR FCL. Might change though in the not so distant future.
A SEP SPA IR will do though to keep it valid.
The problem that the mil boys have is that the normal rules for getting the IR training and flight test still apply from the last exam. So if they get sent away for 6 months come back to leave then training then get sent away again etc etc it all to quickly means the 2 years is up. Once they have it there MIL cat will keep them valid. Just like any ICAO IR.