It has been said that the USA Federal government does not have the power to make anything legal tender for payment of debts, and it is noted that the States are not allowed to make anything except silver and gold coin legal tender for payment of debts.
On the face of it this would seem to make the question of legal tender for payment of money debts up to the States to determine, within the confines of making only silver and gold coins legal tender.
However, when it comes to coinage, the USA Federal government has the power to coin money, regulate the value thereof, and of foreign coin, and the States are prohibited from both coining money, and issuing ‘bills of credit’ (a term that meant paper money at that time).
The power to coin money regulate the value thereof, and the to regulate the value of foreign coin, is the power to determine their legal value. Their market value cannot be regulated, since market values apply when the coins are not tendered to discharge debt but offered in exchange for something else (i.e. for a new market exchange rather than the settlement of an existing unsettled trade). But for coins to have a legal value is to make them a legal tender for that amount – isn’t it?
So it would seem that the USA Federal government can set up a Mint, and regulate its operations and the denominations, fineness, mass and impression, and then also regulate its legal value, and also the legal value of foreign coins, which, under Federal law could be argued would be legal tender in all the States in the union and all federal jurisdictions/territories. On the other hand it could also be argued that the Federal government can coin and regulate its own and foreign coins’ legal values, and the States could pick and choose which or up to what limit those coins, if any, would be legal tender in their respective jurisdictions.
Which of these views would seem to be most reasonable and accurate?
Another question is the ability of the States to make private domestic gold and silver coins legal tender. I can’t see any constitutional provision that would enable the Federal government to prohibit private domestic coinage (other than by States), or the States from making them legal tender, even at the expense of Federal and Federally recognised (i.e. value regulated) foreign coins.
Further along this line of reasoning, a State could launch a parallel currency with a different name/unit of account, e.g. Francs, Grams, Pounds or Dinars, and make particular domestic privately minted coins legal tender for their face values up to limited or unlimited values of the unit of account, enabling people to choose between Federal/Foreign and Domestic/Private coins and units of account.
Even further along this line, States could find ways to disfavour Federal/Foreign coinage, such as by making its parallel currency a cheaper way to discharge debts denominated in the Federal unit of account (not a good idea due to the extent of distortion it would involve, but it could indeed disfavour Federal/Foreign coins).
Banks in the State (and out of State) could also issue bank notes that were payable in the State (and therefore under that State’s legal tender laws), so that paper money as well as coins could be available, but obviously these bank notes constitutionally cannot be made legal tender.
So, it seems to me that any State in the Union can revive and launch a new gold standard.