This is just policy from the air force and it's targeted specifically at educating servicemen (so far as I can tell).
There are a lot of classified papers regarding cyber warfare tactics and logistics. I believe some have been released, in heavily redacted form, that give much better insight into the reach of the gubernment in a shit-hitting-fan scenario.
A choice bit on pg. 35
Attack and exploitation operations in an HD scenario may involve complex legal
and policy issues; however, these issues do not prevent the application of attack and
exploitation operations for HD, but temper it. Unless approved by appropriate
authorities, DOD assets cannot be used to perform attack or exploit operations on US