[–] 17790018? ago (edited ago)
Federal reserve notes, to be issued
at the discretion of the Board of Governors of the Federal Reserve System
for the purpose of making advances to Federal reserve banks
through the Federal reserve agents
as hereinafter set forth and for no other purpose, are authorized.
What this is saying is that everyone who has a federal reserve note is either a federal reserve bank, a member bank, or a federal reserve agent. No other people are mentioned. It doesn't say anything about legal tender.
It only says making advances to banks is authorized as hereinafter set (taxes, customs, and other public dues)