First it provides structural separation in all configurations. That
is a first level of severability and hopefully as much as really is
ever needed. Additionally, in this model, ICANN would have the same
ability to pick another provider, or perhaps a redundant provider,
just as the names or protocols can now. This is made possible by
virtue of structural separation and the defintion of SLA/MOUs
across a corporate boundary.
Further levels of separability can, however, be obtained in the
Shared Service Arrangement configuration or the finally in the Free
Standing configuration.