The Jerusalem Post is reporting that the US is barring IAF pilots who hold foreign (I assume non-Israeli (excluding US?)) passports from flying the F-35i.
This move by the US stems from an increasingly expanding focus on information security and safeguarding US interests. As a result, sources claim the IAF accepted this stipulation and gave up assigning pilots to
F-35 Adir aircraft.
https://www.jpost.com/israel-news/article-726853
If this is true, I wonder if this is going to/has spread to other countries operating the F-35.