> even if the information in that tweet was "material but not non-public due to previously approved disclosure", it would fall afoul of the "more than 2-days since approved" and "approved previously but now has edits" restriction

It's more that the information is "material but not non-public", end of sentence. He's not piggybacking on a previous approval of a post. He's piggybacking on the fact that it's public.

Even if the previous disclosure had been in a post by Musk, I'd argue those rules don't apply to a new post. Those rules are about how approval for a specific post can be revoked, by delaying too long or by editing. They only affect that specific post, not future uses of now-public information.

But the previous disclosure was not such a post. It bypassed the entire tweet approval process. So these secondary rules definitely do not apply.

> (I also believe that the update of the range from "350k-500k" [previously public] to "around 500k" [in the tweet] to be a material update when given by the CEO of a company and that the SEC will argue that is also the case, but I agree/admit that there's some room for argument on that point.)

That's an okay belief. I'm not saying the result is clear-cut, just that Musk has a reasonable argument.

> Thank you for the topic-centered discussion and I hope you experienced (as I did) this exchange as "disagreeing without being disagreeable".

Sure, I'd agree there.