The accepted answer here has a decent source:

https://skeptics.stackexchange.com/questions/56556/does-the-...

> fight in civilian clothing

(Fake) physician, heal thyself.

https://www.pbs.org/newshour/world/israeli-undercover-forces...

> Article 4 applies to soldiers (that e.g. fight in uniform)

Israel openly forbids the importation of uniforms.

https://www.jpost.com/arab-israeli-conflict/israel-seizes-la...