Jonathan Goodish wrote:



I believe that entry into the ADIZ requires more than just "squawking
and talking," as does entry into Class B airspace.

The ADIZ requires:
1. A filed ADIZ flight plan.
2. An assigned code.
3. Communciations with ATC.

It does not require any sort of clearance or permission.

Establishment of
two-way radio communication, even under flight following, is not the
same thing as a clearance.

A clearance is NOT required for the ADIZ.