looks like i was wrong the Supreme Court of the United States in Lane County v. Oregon, 74 U.S. (7 Wallace) 71, 76-78 (1869), and Hagar v. Reclamation District No. 108, 111 U.S. 701, 706 (1884), has ruled that the States may adopt whatever currency they desire for the purposes of performing their sovereign governmental functions, even to the extent of adopting gold and silver coin for those purposes while refusing to employ a currency not redeemable in gold or silver coin that Congress has designated âlegal tenderâ; http://beyondmoney.net/2011/01/16/states-beginning-to-assert-their-money-power/