The operation specifies that perimeter security for legacy networks will deny intrusions and data infiltration, that firewalls will be maintained through risk assessment and formal adjudication of legacy application waiver requests, and that legacy networks will be shut down as quickly a possible after enterprise networks (such as the NMCI) are established.
The procedure outlines that perimeter security for older networks will block unauthorized access and data theft, firewalls must be maintained through risk assessment and formal approval of legacy application exceptions, and legacy networks will be decommissioned as soon as possible after enterprise networks (like NMCI) are set up.