Well, if you look at the treaty, article VIII says the commissioners are to determine the “form and proportion” of the budget from the two parties. In 1956, at the first meeting, the commissioners took that to heart and developed a formula to determine how the budget should be set. That's never been contested.
Up until 2022, that formula was not being met. Until we had political pressure that solved that problem, we were out of compliance. It's certainly linked back to the treaty.