As much as I dislike SpaceX's owner, the phrasing here would seem "reasonable" to me. Remember, Space-X can't use the more "normal"/general "you must be legall

As much as I dislike SpaceX's owner, the phrasing here would seem "reasonable" to me. Remember, Space-X can't use the more "normal"/general "you must be legally permitted to work in the US" because not everyone who can work in the US can work at Space-X, because rockets.