I know, but...
1. It is already too late. Aircraft with TCP/IP protocol systems are already flying and
2. It does not specifically address a requirement for physical separation of flight critical systems (Flight Management, ADS-B and similar data communications networks etc.) from external sources that could compromise their operation.
It even mentions coordinating avionics engineering and a company's IT departments. They obviously have little grasp of reality: IT people have no understanding of the concept of airworthiness. Just look at the farce that was installation of Class 1 and 2 Electronic Flight Bags...