Asmodia apologizes for not thinking of this earlier, especially since it's her responsibility to think of this sort of thing, as the consistency-checker who actually reads everything Keltham sees, all of the documents he's exposed to.
Like Cheliax's contract with the Project.
Keltham wrote in some pretty tight provisions about all of Cheliax's Project-knowledge-derived industry having gratuities payable to the Project.
If the Project shuts down for a year while Cheliax produces a massive amount of spellsilver, even for its own internal use rather than being resold, the contract says an internal price with the Project needs to be negotiated, and the resulting revenue has to accrue to the Project, and revenue has to be reported to Keltham, he clearly did think about the possibility that Cheliax would do a bunch of stuff and theoretically transfer money to the Project but then not tell him about it, and Keltham has the right to examine related accounting and production books.