The change is in where control and visibility live. CISA is telling agencies they can move away from central internet gateways to SASE-based TIC 3.0 designs, but they only keep federal visibility if they rebuild the telemetry path that the old perimeter model provided for free.
The new guidance maps SASE to TIC 3.0 and says agencies can replace MTIPS and other legacy gateway setups with more distributed controls. That shift also relaxes the older expectation that encrypted TLS must always be fully broken and inspected, and it points agencies toward sending equivalent telemetry to CISA through CLAW so EINSTEIN-style visibility is not lost as traffic leaves the central choke point.
For federal civilian agencies, the hard part is no longer just buying the new access stack. It is proving that logging, inspection, and analysis still work when security enforcement is pushed out to the cloud edge.