HCR 2034 introduced by Representatives Johnson, Cooley under the reference title of "abolish federal government; state sovereignty" says that when the United States declares martial law, Arizona is outta here!
when or if the President of the United States, the Congress of the United States or any other federal agent or agency declares the Constitution of the United States to be suspended or abolished, if the President or any other federal entity attempts to institute martial law or its equivalent without an official declaration in one or more of the states without the consent of that state or if any federal order attempts to make it unlawful for individual Americans to own firearms or to confiscate firearms, the State of Arizona, when joined by thirty-four of the other fifty states, declares as follows: that the states resume all state powers delegated by the Constitution of the United States and assume total sovereignty; that the states re-ratify and re-establish the present Constitution of the United States as the charter for the formation of a new federal government, to be followed by the election of a new Congress and President and the reorganization of a new judiciary, similarly following the precedent and procedures of the founding fathers; that individual members of the military return to their respective states and report to the Governor until a new President is elected; that each state assume a negotiated, prorated share of the national debt; that all land within the borders of a state belongs to the state until sold or ceded to the central government by the state’s Legislature and Governor; and that once thirty-five states have agreed to form a new government, each of the remaining fifteen be permitted to join the new confederation on application. [Source, Arizona State Legislature]
Please note that I could not find a copy of this in THOMAS.
Update: The document says it is from House of Representatives, Forty-fourth Legislature , Second Regular Session, 2000. That would be pre-9/11.