Actually, I believe the ADIZ procedure in case of communications
failure, as Michelle stated, is to exit the ADIZ by the shortest
possible route. I once was asked by Potomac to try to help communicate
with a guy who discovered after takeoff that he wasn't receiving. The
other pilot kep declaring his intention to return to the airport (he
was able to transmit) and the controller kept frantically trying to
tell him not to land but to exit the ADIZ.

Wiz