Shai believes that there is no pure translation layer, and that translation is mixed throughout the framework. Also believes that there is no pure order. Shai points out that there seems to be convergence on the advisor role, and an enforcement point that sees packets. Whole layers of security policy can be turned off in some real world scenarios, depending on network load or intrusion status. There also needs to be a policy resolution function to resolve policies from different sources.
Policy is relatively static.
That does not mean it cannot change. It means that it changes on a human time scale. More rapid dynamicity is below the level of policy, where conditions are being evaluated. For example, a policy may be dependent on the state of the network. Hugh notes that there are different scopes of 'dynamicity', where terms are defined in terms of system time, not human time, and that any system needs to allow changes by humans at any time, and allow timely implementation of those changes.