attorneygeneral.gov

[stoneFree]

Relevantly if true, Pennsylvania was the first state to submit paperwork (2011) to the Hague declaring itself sovereign & independent from the defacto government.
LINK

I haven't seen that "Process of Notification" but have met folks online who claim to.

EDIT: I've been told the paperwork can be found here:
http://freedomreigns.us/States_Documents.html