I'm wondering if this proposal is enforced, and you opt out, how would it be known whether you're sending someone a URL? How would a URL even be distinguished from other text when you have opted out? I suppose you could detect some patterns, and it definitely wouldn't be clickable. But is the text google.com considered a URL for example? I guess it isn't? (yeah I know, it's a stupid law anyway, but just wondering)
If you 'opt out', service providers can prevent you from sending anything under these new rules. You might not even be able to reach out to support to complain without consenting to your messages being scanned.
In both cases, they identify and scan something.
Not sure, if there is out at all.