Fix a gold price (parity) and convert gold freely between domestic money and gold at that price.
No restrictions on the export of gold by private citizens or of capital across countries.
Back national banknotes and coinage with gold reserves and condition long-run money growth on gold reserves
In short-run liquidity crises resulting from a gold outflow, have the central bank extend liquidity at higher interest rates (Bagehot’s Rule).
Allow the common worldwide price level to be determined endogenously by world demand and supply of gold.