Perhaps they'll have to fall back on Havequick.
I think it was 1995 when the US decided to downgrade the HQII specification and de-modify the radios, including those we'd bought, without bothering to tell us or amend drawings. When THEY transmitted, we could receive; but when WE transmitted they could receive 50%. (In simple terms).
We re-modified our radios, but only for one aircraft fleet; the first fleet to encrypt a hopper. None of the other project offices (it was before the Mk2 IPTs were formed in 1999) even bothered updating their tech pubs, or ADS to inform the crews there was no point selecting a certain secure mode.
In 2001 a major initiative was developed to improve integration and interoperability. DEC demanded the word "interoperability" be removed as it was not policy for our Services to be interoperable with each other, never mind Allies.