Here's another article that lightly addresses the "non-resident" aspect:
https://www.accruit.com/1031-news/california-drafts-like-kind-exchange-ftb-3840
https://www.accruit.com/1031-news/california-drafts-like-kind-exchange-ftb-3840
Oh yes, I read that three times over. But it doesn't differentiate residence in CA. What's next, I move out of CA and I still need to file when I sell my stocks & funds so I can pay cap gains tax to CA? I'd like to see a challenge to the 3840 by a non-CA resident. If I'm out of CA jurisdiction in all ways, the state should have no right to know what I do and I should have no responsibility to file anything.
Here's another article that lightly addresses the "non-resident" aspect:
https://www.accruit.com/1031-news/california-drafts-like-kind-exchange-ftb-3840