Aside from the large U.S. budgetary commitment to the treaty's enforcement--some $25 million a year--U.S.
There has been no commitment of U.S. funds for treaty enforcement. 
mnli hypothesis: There has been no commitment of U.S. funds for treaty enforcement.  premise: Aside from the large U.S. budgetary commitment to the treaty's enforcement--some $25 million a year--U.S.