The problem is that predates the current constitution. But it appears that Jedi treated it like any other piece of legislation. What we would need to do is find out whether or not the second constitution had the same language as the third, to see if the precedent is valid.
Also, I suggest contacting Marokai Blue and anyone else involved in the crafting of this current constitution. I beleive that would also include Senator Ilikeverin, as well as many others.
The same clause existed in the Second Constitution as in the current one, fwiw. I don't remember treaties ever being discussed, really.