The dictionary?
The gold would be legal tender. Doesn't matter what's written on it; I can doodle artwork on a $10 bill and claim it's worth $1,000 because my art is awesome, but people aren't required to accept it as anything more than $10 towards a debt.
> another comment just told me that there is no gold standard since 1970
What part of that do you object to?
https://en.wikipedia.org/wiki/Bretton_Woods_system
"On 15 August 1971, the United States terminated convertibility of the US dollar to gold, effectively bringing the Bretton Woods system to an end and rendering the dollar a fiat currency."