>Things that are not on the list are neither approved or not approved, their legality either way just hasn't been determined.
That is not correct.
Yes, that is correct.
If something is not on the Approved, Non-Approved Products list. It hasn't been tested so it status has not been determined.
And as I said in that case you err on the side caution and treat it as not approved until you find out otherwise. which is the same as what you posted here:
If a product is not found on the list below, consider it to be NOT APPROVED either before, after, or during certified competition.