Is there a legal requirement that the CAN buses be air-gapped? What has changed since https://www.wired.com/2015/07/hackers-remotely-kill-jeep-highway/ https:/

Is there a legal requirement that the CAN buses be air-gapped? What has changed since https://www.wired.com/2015/07/hackers-remotely-kill-jeep-highway/ https://www.wired.com/2015/07/hackers-remotely-kill-jeep-hig...