As always, Wikipedia: https://en.wikipedia.org/wiki/Gold_certificate_(United_State...
Real world economic policy works by virtue of steady hands and rigorously applied norms, not goofball trickery around edge cases of ancient laws.
[1] The idea that the Treasury's statutory authority to mint coinage could be exploited to mint a single illiquid-by-virtue-of-size asset that could then be borrowed against without increasing the debt ceiling.
The fact they they kept the price fixed should serve as a reminder they can do this at any time. There is no conspiracy theory, they've literally done this and nobody challenged them and no laws have changed since then (thus the "ancient law" that is somehow still in effect). The sophisticated economists that study "real world economic policy works by virtue of steady hands and rigorously applied norms" can make another "ancient law" any time they want.
We're done, this will be my last comment.
Seems like anyone who buys or sells gold at any other price is questioning it.